77745252 has 24 divisors (see below), whose sum is σ = 195360256. Its totient is φ = 23921568.

The previous prime is 77745229. The next prime is 77745257. The reversal of 77745252 is 25254777.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 77745252.

It is not an unprimeable number, because it can be changed into a prime (77745257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249028 + ... + 249339.

Almost surely, 2^77745252 is an apocalyptic number.

It is an amenable number.

77745252 is an abundant number, since it is smaller than the sum of its proper divisors (117615004).

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

77745252 is a wasteful number, since it uses less digits than its factorization.

77745252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498387 (or 498385 counting only the distinct ones).

The product of its digits is 137200, while the sum is 39.

The square root of 77745252 is about 8817.3268057842. The cubic root of 77745252 is about 426.8002107471.

The spelling of 77745252 in words is "seventy-seven million, seven hundred forty-five thousand, two hundred fifty-two".