77074872 has 64 divisors (see below), whose sum is σ = 233176320. Its totient is φ = 20725248.

The previous prime is 77074867. The next prime is 77074873. The reversal of 77074872 is 27847077.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77074873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10638 + ... + 16349.

It is an arithmetic number, because the mean of its divisors is an integer number (3643380).

Almost surely, 2^77074872 is an apocalyptic number.

It is an amenable number.

77074872 is an abundant number, since it is smaller than the sum of its proper divisors (156101448).

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

77074872 is a wasteful number, since it uses less digits than its factorization.

77074872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27020 (or 27016 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 42.

The square root of 77074872 is about 8779.2295789551. The cubic root of 77074872 is about 425.5699334056.

The spelling of 77074872 in words is "seventy-seven million, seventy-four thousand, eight hundred seventy-two".