77564938 has 8 divisors (see below), whose sum is σ = 126924480. Its totient is φ = 35256780.

The previous prime is 77564891. The next prime is 77564939. The reversal of 77564938 is 83946577.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77564891 and 77564900.

It is not an unprimeable number, because it can be changed into a prime (77564939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762818 + ... + 1762861.

It is an arithmetic number, because the mean of its divisors is an integer number (15865560).

Almost surely, 2^77564938 is an apocalyptic number.

77564938 is a deficient number, since it is larger than the sum of its proper divisors (49359542).

77564938 is a wasteful number, since it uses less digits than its factorization.

77564938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525692.

The product of its digits is 1270080, while the sum is 49.

The square root of 77564938 is about 8807.0958891112. The cubic root of 77564938 is about 426.4699971152.

The spelling of 77564938 in words is "seventy-seven million, five hundred sixty-four thousand, nine hundred thirty-eight".