78746906 has 16 divisors (see below), whose sum is σ = 142100160. Its totient is φ = 31972320.

The previous prime is 78746903. The next prime is 78746911. The reversal of 78746906 is 60964787.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78746903) 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, 147755 + ... + 148286.

It is an arithmetic number, because the mean of its divisors is an integer number (8881260).

Almost surely, 2^78746906 is an apocalyptic number.

78746906 is a deficient number, since it is larger than the sum of its proper divisors (63353254).

78746906 is a wasteful number, since it uses less digits than its factorization.

78746906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296069.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 78746906 is about 8873.9453457862. The cubic root of 78746906 is about 428.6253305643.

The spelling of 78746906 in words is "seventy-eight million, seven hundred forty-six thousand, nine hundred six".