42978774 has 16 divisors (see below), whose sum is σ = 87787008. Its totient is φ = 14021352.

The previous prime is 42978773. The next prime is 42978781. The reversal of 42978774 is 47787924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42978773) 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, 75922 + ... + 76485.

It is an arithmetic number, because the mean of its divisors is an integer number (5486688).

Almost surely, 2^42978774 is an apocalyptic number.

42978774 is an abundant number, since it is smaller than the sum of its proper divisors (44808234).

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

42978774 is a wasteful number, since it uses less digits than its factorization.

42978774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152459.

The product of its digits is 790272, while the sum is 48.

The square root of 42978774 is about 6555.8198571956. The cubic root of 42978774 is about 350.2821507158.

The spelling of 42978774 in words is "forty-two million, nine hundred seventy-eight thousand, seven hundred seventy-four".