77878372 has 48 divisors (see below), whose sum is σ = 161243712. Its totient is φ = 32446080.

The previous prime is 77878363. The next prime is 77878379. The reversal of 77878372 is 27387877.

It is not an unprimeable number, because it can be changed into a prime (77878379) 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, 98563 + ... + 99349.

It is an arithmetic number, because the mean of its divisors is an integer number (3359244).

Almost surely, 2^77878372 is an apocalyptic number.

It is an amenable number.

77878372 is an abundant number, since it is smaller than the sum of its proper divisors (83365340).

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

77878372 is a wasteful number, since it uses less digits than its factorization.

77878372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 986 counting only the distinct ones).

The product of its digits is 921984, while the sum is 49.

The square root of 77878372 is about 8824.8723503516. The cubic root of 77878372 is about 427.0436693322.

The spelling of 77878372 in words is "seventy-seven million, eight hundred seventy-eight thousand, three hundred seventy-two".