77976252 has 18 divisors (see below), whose sum is σ = 197106728. Its totient is φ = 25992072.

The previous prime is 77976251. The next prime is 77976257. The reversal of 77976252 is 25267977.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 77976198 and 77976207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77976251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1082968 + ... + 1083039.

Almost surely, 2^77976252 is an apocalyptic number.

It is an amenable number.

77976252 is an abundant number, since it is smaller than the sum of its proper divisors (119130476).

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

77976252 is a wasteful number, since it uses less digits than its factorization.

77976252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166017 (or 2166012 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 77976252 is about 8830.4162982274. The cubic root of 77976252 is about 427.2225017605. Note that the first 3 decimals are identical.

The spelling of 77976252 in words is "seventy-seven million, nine hundred seventy-six thousand, two hundred fifty-two".