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77908242 = 2312984707
BaseRepresentation
bin1001010010011…
…00100100010010
312102121011000110
410221030210102
5124421030432
611421502150
71634131506
oct451144422
9172534013
1077908242
113aa82685
1222111956
13131aa269
14a4c0306
156c8ddcc
hex4a4c912

77908242 has 8 divisors (see below), whose sum is σ = 155816496. Its totient is φ = 25969412.

The previous prime is 77908223. The next prime is 77908253. The reversal of 77908242 is 24280977.

It is a sphenic number, since it is the product of 3 distinct primes.

77908242 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 77908242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6492348 + ... + 6492359.

It is an arithmetic number, because the mean of its divisors is an integer number (19477062).

Almost surely, 277908242 is an apocalyptic number.

77908242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77908242 is a wasteful number, since it uses less digits than its factorization.

77908242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12984712.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 77908242 is about 8826.5645638606. The cubic root of 77908242 is about 427.0982594305.

The spelling of 77908242 in words is "seventy-seven million, nine hundred eight thousand, two hundred forty-two".

Divisors: 1 2 3 6 12984707 25969414 38954121 77908242