7912978 has 8 divisors (see below), whose sum is σ = 11891772. Its totient is φ = 3949056.

The previous prime is 7912951. The next prime is 7912991. The reversal of 7912978 is 8792197.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7912969 + 9 = 2813^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2275 + ... + 4582.

Almost surely, 2^7912978 is an apocalyptic number.

7912978 is a deficient number, since it is larger than the sum of its proper divisors (3978794).

7912978 is a wasteful number, since it uses less digits than its factorization.

7912978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436.

The product of its digits is 63504, while the sum is 43.

The square root of 7912978 is about 2813.0015997152. The cubic root of 7912978 is about 199.2721712059.

The spelling of 7912978 in words is "seven million, nine hundred twelve thousand, nine hundred seventy-eight".