77935940 has 24 divisors (see below), whose sum is σ = 164770200. Its totient is φ = 30963968.

The previous prime is 77935931. The next prime is 77935951. The reversal of 77935940 is 4953977.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 917764 + 77018176 = 958^2 + 8776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77935891 and 77935900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10097 + ... + 16056.

It is an arithmetic number, because the mean of its divisors is an integer number (6865425).

Almost surely, 2^77935940 is an apocalyptic number.

It is an amenable number.

77935940 is an abundant number, since it is smaller than the sum of its proper divisors (86834260).

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

77935940 is a wasteful number, since it uses less digits than its factorization.

77935940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26311 (or 26309 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 77935940 is about 8828.1334380491. The cubic root of 77935940 is about 427.1488675376.

The spelling of 77935940 in words is "seventy-seven million, nine hundred thirty-five thousand, nine hundred forty".