78306930 has 192 divisors, whose sum is σ = 241532928. Its totient is φ = 17418240.

The previous prime is 78306929. The next prime is 78306941. The reversal of 78306930 is 3960387.

It is a super-2 number, since 2×78306930² = 12263950572049800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 616527 + ... + 616653.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^78306930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78306930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120766464).

78306930 is an abundant number, since it is smaller than the sum of its proper divisors (163225998).

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

78306930 is a wasteful number, since it uses less digits than its factorization.

78306930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 78306930 is about 8849.1202952610. The cubic root of 78306930 is about 427.8255650718.

The spelling of 78306930 in words is "seventy-eight million, three hundred six thousand, nine hundred thirty".