40879978 has 8 divisors (see below), whose sum is σ = 61767972. Its totient is φ = 20290656.

The previous prime is 40879967. The next prime is 40879981. The reversal of 40879978 is 87997804.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37736449 + 3143529 = 6143^2 + 1773^2 .

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, 74325 + ... + 74872.

Almost surely, 2^40879978 is an apocalyptic number.

40879978 is a deficient number, since it is larger than the sum of its proper divisors (20887994).

40879978 is a wasteful number, since it uses less digits than its factorization.

40879978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149336.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 40879978 is about 6393.7452248272. The cubic root of 40879978 is about 344.4849220631.

The spelling of 40879978 in words is "forty million, eight hundred seventy-nine thousand, nine hundred seventy-eight".