78738372 has 24 divisors (see below), whose sum is σ = 204136800. Its totient is φ = 26246088.

The previous prime is 78738371. The next prime is 78738379. The reversal of 78738372 is 27383787.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78738371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364422 + ... + 364637.

It is an arithmetic number, because the mean of its divisors is an integer number (8505700).

Almost surely, 2^78738372 is an apocalyptic number.

It is an amenable number.

78738372 is an abundant number, since it is smaller than the sum of its proper divisors (125398428).

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

78738372 is a wasteful number, since it uses less digits than its factorization.

78738372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729072 (or 729064 counting only the distinct ones).

The product of its digits is 395136, while the sum is 45.

The square root of 78738372 is about 8873.4644868845. The cubic root of 78738372 is about 428.6098462704.

The spelling of 78738372 in words is "seventy-eight million, seven hundred thirty-eight thousand, three hundred seventy-two".