78256946 has 16 divisors (see below), whose sum is σ = 120845088. Its totient is φ = 37984800.

The previous prime is 78256943. The next prime is 78256963. The reversal of 78256946 is 64965287.

It is a super-2 number, since 2×78256946² = 12248299194493832, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78256946.

It is not an unprimeable number, because it can be changed into a prime (78256943) 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, 15041 + ... + 19563.

It is an arithmetic number, because the mean of its divisors is an integer number (7552818).

Almost surely, 2^78256946 is an apocalyptic number.

78256946 is a deficient number, since it is larger than the sum of its proper divisors (42588142).

78256946 is a wasteful number, since it uses less digits than its factorization.

78256946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777.

The product of its digits is 725760, while the sum is 47.

The square root of 78256946 is about 8846.2956088975. The cubic root of 78256946 is about 427.7345174271.

The spelling of 78256946 in words is "seventy-eight million, two hundred fifty-six thousand, nine hundred forty-six".