78396552 has 64 divisors (see below), whose sum is σ = 234528000. Its totient is φ = 24121152.

The previous prime is 78396533. The next prime is 78396589. The reversal of 78396552 is 25569387.

It is a happy number.

78396552 is a `hidden beast` number, since 7 + 8 + 3 + 96 + 552 = 666.

It is a super-2 number, since 2×78396552² = 12292038730977408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78396498 and 78396507.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11152 + ... + 16767.

It is an arithmetic number, because the mean of its divisors is an integer number (3664500).

Almost surely, 2^78396552 is an apocalyptic number.

78396552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78396552 is an abundant number, since it is smaller than the sum of its proper divisors (156131448).

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

78396552 is a wasteful number, since it uses less digits than its factorization.

78396552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27947 (or 27937 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 78396552 is about 8854.1827403776. The cubic root of 78396552 is about 427.9887177857.

The spelling of 78396552 in words is "seventy-eight million, three hundred ninety-six thousand, five hundred fifty-two".