78748992 has 84 divisors (see below), whose sum is σ = 257978656. Its totient is φ = 22498560.

The previous prime is 78748963. The next prime is 78748997. The reversal of 78748992 is 29984787.

78748992 is a `hidden beast` number, since 78 + 7 + 489 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78748997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5734 + ... + 13797.

Almost surely, 2^78748992 is an apocalyptic number.

78748992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78748992 is an abundant number, since it is smaller than the sum of its proper divisors (179229664).

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

78748992 is a wasteful number, since it uses less digits than its factorization.

78748992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19556 (or 19543 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 78748992 is about 8874.0628801018. The cubic root of 78748992 is about 428.6291152825.

The spelling of 78748992 in words is "seventy-eight million, seven hundred forty-eight thousand, nine hundred ninety-two".