77257290 has 48 divisors (see below), whose sum is σ = 203815584. Its totient is φ = 18728160.

The previous prime is 77257261. The next prime is 77257291. The reversal of 77257290 is 9275277.

It is not an unprimeable number, because it can be changed into a prime (77257291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7012 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (4246158).

Almost surely, 2^77257290 is an apocalyptic number.

77257290 is an abundant number, since it is smaller than the sum of its proper divisors (126558294).

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

77257290 is a wasteful number, since it uses less digits than its factorization.

77257290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21315 (or 21304 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 77257290 is about 8789.6126194503. The cubic root of 77257290 is about 425.9054100198.

The spelling of 77257290 in words is "seventy-seven million, two hundred fifty-seven thousand, two hundred ninety".