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70901980 = 2257348563
BaseRepresentation
bin1000011100111…
…10000011011100
311221102012020021
410032132003130
5121122330410
611011401524
71520441212
oct416360334
9157365207
1070901980
1137027786
121b8b32a4
13118c6246
1495b8cb2
156357eda
hex439e0dc

70901980 has 24 divisors (see below), whose sum is σ = 150936912. Its totient is φ = 27971712.

The previous prime is 70901933. The next prime is 70901981. The reversal of 70901980 is 8910907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70901981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22822 + ... + 25741.

It is an arithmetic number, because the mean of its divisors is an integer number (6289038).

Almost surely, 270901980 is an apocalyptic number.

It is an amenable number.

70901980 is an abundant number, since it is smaller than the sum of its proper divisors (80034932).

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

70901980 is a wasteful number, since it uses less digits than its factorization.

70901980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48645 (or 48643 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 70901980 is about 8420.3313473996. The cubic root of 70901980 is about 413.8911318054.

The spelling of 70901980 in words is "seventy million, nine hundred one thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 73 146 292 365 730 1460 48563 97126 194252 242815 485630 971260 3545099 7090198 14180396 17725495 35450990 70901980