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1020490380 = 22335713191093
BaseRepresentation
bin111100110100110…
…111001010001100
32122010020021122000
4330310313022030
54042221143010
6245132352300
734201011420
oct7464671214
92563207560
101020490380
11484049588
12245915690
13133562880
1499762b80
155e8cc7c0
hex3cd3728c

1020490380 has 384 divisors, whose sum is σ = 4116940800. Its totient is φ = 203793408.

The previous prime is 1020490363. The next prime is 1020490397. The reversal of 1020490380 is 830940201.

It is an interprime number because it is at equal distance from previous prime (1020490363) and next prime (1020490397).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 933114 + ... + 934206.

It is an arithmetic number, because the mean of its divisors is an integer number (10721200).

Almost surely, 21020490380 is an apocalyptic number.

1020490380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020490380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058470400).

1020490380 is an abundant number, since it is smaller than the sum of its proper divisors (3096450420).

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

1020490380 is a wasteful number, since it uses less digits than its factorization.

1020490380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1020490380 is about 31945.1151195296. The cubic root of 1020490380 is about 1006.7839999389.

The spelling of 1020490380 in words is "one billion, twenty million, four hundred ninety thousand, three hundred eighty".