77631402 has 32 divisors (see below), whose sum is σ = 160231104. Its totient is φ = 25056000.

The previous prime is 77631391. The next prime is 77631427. The reversal of 77631402 is 20413677.

It is a self number, because there is not a number n which added to its sum of digits gives 77631402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52777 + ... + 54227.

It is an arithmetic number, because the mean of its divisors is an integer number (5007222).

Almost surely, 2^77631402 is an apocalyptic number.

77631402 is an abundant number, since it is smaller than the sum of its proper divisors (82599702).

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

77631402 is a wasteful number, since it uses less digits than its factorization.

77631402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 77631402 is about 8810.8684021497. The cubic root of 77631402 is about 426.5917738286.

The spelling of 77631402 in words is "seventy-seven million, six hundred thirty-one thousand, four hundred two".