78727752 has 24 divisors (see below), whose sum is σ = 213221190. Its totient is φ = 26242560.

The previous prime is 78727723. The next prime is 78727763. The reversal of 78727752 is 25772787.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71470116 + 7257636 = 8454^2 + 2694^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 78727698 and 78727707.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 546649 + ... + 546792.

Almost surely, 2^78727752 is an apocalyptic number.

78727752 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78727752 is an abundant number, since it is smaller than the sum of its proper divisors (134493438).

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

78727752 is a wasteful number, since it uses less digits than its factorization.

78727752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093453 (or 1093446 counting only the distinct ones).

The product of its digits is 384160, while the sum is 45.

The square root of 78727752 is about 8872.8660533111. The cubic root of 78727752 is about 428.5905755255.

The spelling of 78727752 in words is "seventy-eight million, seven hundred twenty-seven thousand, seven hundred fifty-two".