77009144 has 16 divisors (see below), whose sum is σ = 144620520. Its totient is φ = 38443680.

The previous prime is 77009113. The next prime is 77009183. The reversal of 77009144 is 44190077.

It is a super-2 number, since 2×77009144² = 11860816519225472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77009144.

It is a congruent number.

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, 1994 + ... + 12569.

Almost surely, 2^77009144 is an apocalyptic number.

It is an amenable number.

77009144 is a deficient number, since it is larger than the sum of its proper divisors (67611376).

77009144 is a wasteful number, since it uses less digits than its factorization.

77009144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15230 (or 15226 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 77009144 is about 8775.4853996802. The cubic root of 77009144 is about 425.4489263254.

The spelling of 77009144 in words is "seventy-seven million, nine thousand, one hundred forty-four".