77371872 has 48 divisors (see below), whose sum is σ = 203575680. Its totient is φ = 25730432.

The previous prime is 77371871. The next prime is 77371873. The reversal of 77371872 is 27817377.

It is an interprime number because it is at equal distance from previous prime (77371871) and next prime (77371873).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77371871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62653 + ... + 63875.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^77371872 is an apocalyptic number.

It is an amenable number.

77371872 is an abundant number, since it is smaller than the sum of its proper divisors (126203808).

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

77371872 is a wasteful number, since it uses less digits than its factorization.

77371872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1887 counting only the distinct ones).

The product of its digits is 115248, while the sum is 42.

The square root of 77371872 is about 8796.1282391743. The cubic root of 77371872 is about 426.1158625978.

The spelling of 77371872 in words is "seventy-seven million, three hundred seventy-one thousand, eight hundred seventy-two".