420315978 has 16 divisors (see below), whose sum is σ = 841320000. Its totient is φ = 139990656.

The previous prime is 420315977. The next prime is 420316003. The reversal of 420315978 is 879513024.

It is not an unprimeable number, because it can be changed into a prime (420315977) 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, 20550 + ... + 35537.

It is an arithmetic number, because the mean of its divisors is an integer number (52582500).

Almost surely, 2^420315978 is an apocalyptic number.

420315978 is an abundant number, since it is smaller than the sum of its proper divisors (421004022).

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

420315978 is a wasteful number, since it uses less digits than its factorization.

420315978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57341.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 420315978 is about 20501.6091563565. The cubic root of 420315978 is about 749.0749947338.

The spelling of 420315978 in words is "four hundred twenty million, three hundred fifteen thousand, nine hundred seventy-eight".