78742392 has 32 divisors (see below), whose sum is σ = 197076480. Its totient is φ = 26218080.

The previous prime is 78742379. The next prime is 78742393. The reversal of 78742392 is 29324787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78742393) 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, 35673 + ... + 37815.

It is an arithmetic number, because the mean of its divisors is an integer number (6158640).

Almost surely, 2^78742392 is an apocalyptic number.

It is an amenable number.

78742392 is an abundant number, since it is smaller than the sum of its proper divisors (118334088).

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

78742392 is a wasteful number, since it uses less digits than its factorization.

78742392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683 (or 3679 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 78742392 is about 8873.6910020577. The cubic root of 78742392 is about 428.6171403940.

The spelling of 78742392 in words is "seventy-eight million, seven hundred forty-two thousand, three hundred ninety-two".