78233930 has 16 divisors (see below), whose sum is σ = 141306984. Its totient is φ = 31185600.

The previous prime is 78233921. The next prime is 78233951. The reversal of 78233930 is 3933287.

It can be written as a sum of positive squares in 4 ways, for example, as 63664441 + 14569489 = 7979^2 + 3817^2 .

It is a super-2 number, since 2×78233930² = 12241095606489800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 10421 + ... + 16280.

Almost surely, 2^78233930 is an apocalyptic number.

78233930 is a deficient number, since it is larger than the sum of its proper divisors (63073054).

78233930 is a wasteful number, since it uses less digits than its factorization.

78233930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27001.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 78233930 is about 8844.9946297327. The cubic root of 78233930 is about 427.6925799232.

The spelling of 78233930 in words is "seventy-eight million, two hundred thirty-three thousand, nine hundred thirty".