77440004 has 12 divisors (see below), whose sum is σ = 135690828. Its totient is φ = 38671200.

The previous prime is 77439997. The next prime is 77440043. The reversal of 77440004 is 40004477.

It can be written as a sum of positive squares in 2 ways, for example, as 21160000 + 56280004 = 4600^2 + 7502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8507 + ... + 15074.

It is an arithmetic number, because the mean of its divisors is an integer number (11307569).

Almost surely, 2^77440004 is an apocalyptic number.

It is an amenable number.

77440004 is a deficient number, since it is larger than the sum of its proper divisors (58250824).

77440004 is a wasteful number, since it uses less digits than its factorization.

77440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24406 (or 24404 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 77440004 is about 8800.0002272727. Note that the first 3 decimals coincide. The cubic root of 77440004 is about 426.2409020455.

The spelling of 77440004 in words is "seventy-seven million, four hundred forty thousand, four".