78165430 has 32 divisors (see below), whose sum is σ = 169263360. Its totient is φ = 25388640.

The previous prime is 78165419. The next prime is 78165457. The reversal of 78165430 is 3456187.

It is a super-2 number, since 2×78165430² = 12219668894169800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28056 + ... + 30715.

It is an arithmetic number, because the mean of its divisors is an integer number (5289480).

Almost surely, 2^78165430 is an apocalyptic number.

78165430 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78165430 is an abundant number, since it is smaller than the sum of its proper divisors (91097930).

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

78165430 is a wasteful number, since it uses less digits than its factorization.

78165430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58804.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78165430 is about 8841.1215351900. The cubic root of 78165430 is about 427.5677172347.

The spelling of 78165430 in words is "seventy-eight million, one hundred sixty-five thousand, four hundred thirty".