78119930 has 32 divisors (see below), whose sum is σ = 170159616. Its totient is φ = 25208064.

The previous prime is 78119929. The next prime is 78119941. The reversal of 78119930 is 3991187.

It is a super-2 number, since 2×78119930² = 12205446926409800, which contains 22 as substring.

It is a Curzon 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, 31634 + ... + 34013.

It is an arithmetic number, because the mean of its divisors is an integer number (5317488).

Almost surely, 2^78119930 is an apocalyptic number.

78119930 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78119930 is an abundant number, since it is smaller than the sum of its proper divisors (92039686).

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

78119930 is a wasteful number, since it uses less digits than its factorization.

78119930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65678.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 78119930 is about 8838.5479576682. The cubic root of 78119930 is about 427.4847389192.

The spelling of 78119930 in words is "seventy-eight million, one hundred nineteen thousand, nine hundred thirty".