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1228300980 = 2235191077457
BaseRepresentation
bin100100100110110…
…0110001010110100
310011121021011011220
41021031212022310
510003421112410
6321514430340
742303246264
oct11115461264
93147234156
101228300980
11580386785
122a34323b0
1316762301a
14b91b97a4
1572c7b070
hex493662b4

1228300980 has 48 divisors (see below), whose sum is σ = 3620258880. Its totient is φ = 310307328.

The previous prime is 1228300979. The next prime is 1228300987. The reversal of 1228300980 is 890038221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228300987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537589 + ... + 539868.

It is an arithmetic number, because the mean of its divisors is an integer number (75422060).

Almost surely, 21228300980 is an apocalyptic number.

1228300980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228300980 is an abundant number, since it is smaller than the sum of its proper divisors (2391957900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1228300980 is a wasteful number, since it uses less digits than its factorization.

1228300980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077488 (or 1077486 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1228300980 is about 35047.1251317423. The cubic root of 1228300980 is about 1070.9477089935.

The spelling of 1228300980 in words is "one billion, two hundred twenty-eight million, three hundred thousand, nine hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 19 20 30 38 57 60 76 95 114 190 228 285 380 570 1140 1077457 2154914 3232371 4309828 5387285 6464742 10774570 12929484 16161855 20471683 21549140 32323710 40943366 61415049 64647420 81886732 102358415 122830098 204716830 245660196 307075245 409433660 614150490 1228300980