420676978 has 16 divisors (see below), whose sum is σ = 645667200. Its totient is φ = 205471696.

The previous prime is 420676961. The next prime is 420676979. The reversal of 420676978 is 879676024.

It is not an unprimeable number, because it can be changed into a prime (420676979) 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, 48948 + ... + 56896.

It is an arithmetic number, because the mean of its divisors is an integer number (40354200).

Almost surely, 2^420676978 is an apocalyptic number.

420676978 is a deficient number, since it is larger than the sum of its proper divisors (224990222).

420676978 is a wasteful number, since it uses less digits than its factorization.

420676978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8561.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 420676978 is about 20510.4114536983. The cubic root of 420676978 is about 749.2893879570.

The spelling of 420676978 in words is "four hundred twenty million, six hundred seventy-six thousand, nine hundred seventy-eight".