78810552 has 48 divisors (see below), whose sum is σ = 214110000. Its totient is φ = 26188416.

The previous prime is 78810539. The next prime is 78810593. The reversal of 78810552 is 25501887.

It is a super-2 number, since 2×78810552² = 12422206213089408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24324 + ... + 27372.

It is an arithmetic number, because the mean of its divisors is an integer number (4460625).

Almost surely, 2^78810552 is an apocalyptic number.

78810552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78810552 is an abundant number, since it is smaller than the sum of its proper divisors (135299448).

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

78810552 is a wasteful number, since it uses less digits than its factorization.

78810552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420 (or 3413 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 78810552 is about 8877.5307377671. The cubic root of 78810552 is about 428.7407761221.

The spelling of 78810552 in words is "seventy-eight million, eight hundred ten thousand, five hundred fifty-two".