77677240 has 16 divisors (see below), whose sum is σ = 174773880. Its totient is φ = 31070880.

The previous prime is 77677213. The next prime is 77677253. The reversal of 77677240 is 4277677.

It is a super-2 number, since 2×77677240² = 12067507228035200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1941931 = 77677240 / (7 + 7 + 6 + 7 + 7 + 2 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 77677193 and 77677202.

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, 970926 + ... + 971005.

Almost surely, 2^77677240 is an apocalyptic number.

It is an amenable number.

77677240 is an abundant number, since it is smaller than the sum of its proper divisors (97096640).

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

77677240 is a wasteful number, since it uses less digits than its factorization.

77677240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941942 (or 1941938 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 40.

The square root of 77677240 is about 8813.4692374796. The cubic root of 77677240 is about 426.6757186665.

The spelling of 77677240 in words is "seventy-seven million, six hundred seventy-seven thousand, two hundred forty".