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1980556900 = 225272829367
BaseRepresentation
bin111011000001100…
…1110011001100100
312010000202201022021
41312003032121210
513024010310100
6524310112524
7100036312240
oct16603163144
95100681267
101980556900
11926a77793
1247334b744
1325742a57a
1414b077420
15b8d21a1a
hex760ce664

1980556900 has 36 divisors (see below), whose sum is σ = 4911782848. Its totient is φ = 679047840.

The previous prime is 1980556889. The next prime is 1980556901. The reversal of 1980556900 is 96550891.

It is a happy number.

It is a super-2 number, since 2×19805569002 = 7845211268275220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1980556901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1413984 + ... + 1415383.

Almost surely, 21980556900 is an apocalyptic number.

1980556900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980556900 is an abundant number, since it is smaller than the sum of its proper divisors (2931225948).

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

1980556900 is a wasteful number, since it uses less digits than its factorization.

1980556900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829388 (or 2829381 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 1980556900 is about 44503.4481810118. The cubic root of 1980556900 is about 1255.8249524464.

The spelling of 1980556900 in words is "one billion, nine hundred eighty million, five hundred fifty-six thousand, nine hundred".

Divisors: 1 2 4 5 7 10 14 20 25 28 35 50 70 100 140 175 350 700 2829367 5658734 11317468 14146835 19805569 28293670 39611138 56587340 70734175 79222276 99027845 141468350 198055690 282936700 396111380 495139225 990278450 1980556900