77245290 has 24 divisors (see below), whose sum is σ = 200837988. Its totient is φ = 20598720.

The previous prime is 77245277. The next prime is 77245291. The reversal of 77245290 is 9254277.

It can be written as a sum of positive squares in 2 ways, for example, as 74080449 + 3164841 = 8607^2 + 1779^2 .

It is not an unprimeable number, because it can be changed into a prime (77245291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429051 + ... + 429230.

Almost surely, 2^77245290 is an apocalyptic number.

77245290 is an abundant number, since it is smaller than the sum of its proper divisors (123592698).

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

77245290 is a wasteful number, since it uses less digits than its factorization.

77245290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858294 (or 858291 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 77245290 is about 8788.9299690008. The cubic root of 77245290 is about 425.8833576044.

The spelling of 77245290 in words is "seventy-seven million, two hundred forty-five thousand, two hundred ninety".