78325992 has 24 divisors (see below), whose sum is σ = 212133090. Its totient is φ = 26108640.

The previous prime is 78325991. The next prime is 78326009. The reversal of 78325992 is 29952387.

It can be written as a sum of positive squares in only one way, i.e., 77898276 + 427716 = 8826^2 + 654^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×78325992² = 12269922045568128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78325991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 543859 + ... + 544002.

Almost surely, 2^78325992 is an apocalyptic number.

78325992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78325992 is an abundant number, since it is smaller than the sum of its proper divisors (133807098).

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

78325992 is a wasteful number, since it uses less digits than its factorization.

78325992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087873 (or 1087866 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 78325992 is about 8850.1972859366. The cubic root of 78325992 is about 427.8602769816.

It can be divided in two parts, 7832 and 5992, that added together give a cube (13824 = 24³).

The spelling of 78325992 in words is "seventy-eight million, three hundred twenty-five thousand, nine hundred ninety-two".