78141904 has 20 divisors (see below), whose sum is σ = 151782820. Its totient is φ = 38972160.

The previous prime is 78141887. The next prime is 78141937. The reversal of 78141904 is 40914187.

It can be written as a sum of positive squares in 2 ways, for example, as 48330304 + 29811600 = 6952^2 + 5460^2 .

It is a super-2 number, since 2×78141904² = 12212314321490432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78141904.

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, 574 + ... + 12514.

It is an arithmetic number, because the mean of its divisors is an integer number (7589141).

Almost surely, 2^78141904 is an apocalyptic number.

It is an amenable number.

78141904 is a deficient number, since it is larger than the sum of its proper divisors (73640916).

78141904 is a wasteful number, since it uses less digits than its factorization.

78141904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358 (or 12352 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78141904 is about 8839.7909477544. The cubic root of 78141904 is about 427.5248169080.

The spelling of 78141904 in words is "seventy-eight million, one hundred forty-one thousand, nine hundred four".