77012838 has 24 divisors (see below), whose sum is σ = 190698768. Its totient is φ = 22003632.

The previous prime is 77012807. The next prime is 77012849. The reversal of 77012838 is 83821077.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305481 + ... + 305732.

It is an arithmetic number, because the mean of its divisors is an integer number (7945782).

Almost surely, 2^77012838 is an apocalyptic number.

77012838 is an abundant number, since it is smaller than the sum of its proper divisors (113685930).

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

77012838 is a wasteful number, since it uses less digits than its factorization.

77012838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611228 (or 611225 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 77012838 is about 8775.6958698442. The cubic root of 77012838 is about 425.4557289081.

The spelling of 77012838 in words is "seventy-seven million, twelve thousand, eight hundred thirty-eight".