77407690 has 16 divisors (see below), whose sum is σ = 139581792. Its totient is φ = 30907984.

The previous prime is 77407669. The next prime is 77407703. The reversal of 77407690 is 9670477.

It is a happy number.

It is a super-2 number, since 2×77407690² = 11983900942272200, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 724 + ... + 12463.

It is an arithmetic number, because the mean of its divisors is an integer number (8723862).

Almost surely, 2^77407690 is an apocalyptic number.

77407690 is a deficient number, since it is larger than the sum of its proper divisors (62174102).

77407690 is a wasteful number, since it uses less digits than its factorization.

77407690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13781.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 77407690 is about 8798.1640130200. The cubic root of 77407690 is about 426.1816068318.

The spelling of 77407690 in words is "seventy-seven million, four hundred seven thousand, six hundred ninety".