78455504 has 20 divisors (see below), whose sum is σ = 152164740. Its totient is φ = 39187200.

The previous prime is 78455491. The next prime is 78455519. The reversal of 78455504 is 40555487.

It can be written as a sum of positive squares in 2 ways, for example, as 24403600 + 54051904 = 4940^2 + 7352^2 .

It is a super-2 number, since 2×78455504² = 12310532215788032, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 18932 + ... + 22700.

It is an arithmetic number, because the mean of its divisors is an integer number (7608237).

Almost surely, 2^78455504 is an apocalyptic number.

It is an amenable number.

78455504 is a deficient number, since it is larger than the sum of its proper divisors (73709236).

78455504 is a wasteful number, since it uses less digits than its factorization.

78455504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078 (or 5072 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 38.

The square root of 78455504 is about 8857.5111628493. The cubic root of 78455504 is about 428.0959693956.

The spelling of 78455504 in words is "seventy-eight million, four hundred fifty-five thousand, five hundred four".