78134790 has 32 divisors (see below), whose sum is σ = 190169856. Its totient is φ = 20541920.

The previous prime is 78134759. The next prime is 78134803. The reversal of 78134790 is 9743187.

It is a super-2 number, since 2×78134790² = 12210090816688200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 16212 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (5942808).

Almost surely, 2^78134790 is an apocalyptic number.

78134790 is an abundant number, since it is smaller than the sum of its proper divisors (112035066).

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

78134790 is a wasteful number, since it uses less digits than its factorization.

78134790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36764.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 78134790 is about 8839.3885535143. The cubic root of 78134790 is about 427.5118426322.

The spelling of 78134790 in words is "seventy-eight million, one hundred thirty-four thousand, seven hundred ninety".