78904930 has 16 divisors (see below), whose sum is σ = 152954424. Its totient is φ = 29134080.

The previous prime is 78904921. The next prime is 78904933. The reversal of 78904930 is 3940987.

It can be written as a sum of positive squares in 4 ways, for example, as 49126081 + 29778849 = 7009^2 + 5457^2 .

It is not an unprimeable number, because it can be changed into a prime (78904933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303351 + ... + 303610.

Almost surely, 2^78904930 is an apocalyptic number.

78904930 is a deficient number, since it is larger than the sum of its proper divisors (74049494).

78904930 is a wasteful number, since it uses less digits than its factorization.

78904930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606981.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 78904930 is about 8882.8447020085. The cubic root of 78904930 is about 428.9118511644.

The spelling of 78904930 in words is "seventy-eight million, nine hundred four thousand, nine hundred thirty".