77873972 has 12 divisors (see below), whose sum is σ = 148668576. Its totient is φ = 35397240.

The previous prime is 77873963. The next prime is 77873977. The reversal of 77873972 is 27937877.

It is a self number, because there is not a number n which added to its sum of digits gives 77873972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77873977) 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, 884888 + ... + 884975.

It is an arithmetic number, because the mean of its divisors is an integer number (12389048).

Almost surely, 2^77873972 is an apocalyptic number.

It is an amenable number.

77873972 is a deficient number, since it is larger than the sum of its proper divisors (70794604).

77873972 is a wasteful number, since it uses less digits than its factorization.

77873972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769878 (or 1769876 counting only the distinct ones).

The product of its digits is 1037232, while the sum is 50.

The square root of 77873972 is about 8824.6230514396. The cubic root of 77873972 is about 427.0356267590.

The spelling of 77873972 in words is "seventy-seven million, eight hundred seventy-three thousand, nine hundred seventy-two".