42270978 has 16 divisors (see below), whose sum is σ = 86508576. Its totient is φ = 13762560.

The previous prime is 42270973. The next prime is 42270979. The reversal of 42270978 is 87907224.

It is not an unprimeable number, because it can be changed into a prime (42270973) 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, 81663 + ... + 82178.

It is an arithmetic number, because the mean of its divisors is an integer number (5406786).

Almost surely, 2^42270978 is an apocalyptic number.

42270978 is an abundant number, since it is smaller than the sum of its proper divisors (44237598).

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

42270978 is a wasteful number, since it uses less digits than its factorization.

42270978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163889.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 42270978 is about 6501.6134920495. The cubic root of 42270978 is about 348.3486234191.

The spelling of 42270978 in words is "forty-two million, two hundred seventy thousand, nine hundred seventy-eight".