42974390 has 32 divisors (see below), whose sum is σ = 83639520. Its totient is φ = 15842304.

The previous prime is 42974363. The next prime is 42974413. The reversal of 42974390 is 9347924.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3974 + ... + 10086.

It is an arithmetic number, because the mean of its divisors is an integer number (2613735).

Almost surely, 2^42974390 is an apocalyptic number.

42974390 is a deficient number, since it is larger than the sum of its proper divisors (40665130).

42974390 is a wasteful number, since it uses less digits than its factorization.

42974390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 42974390 is about 6555.4854892677. The cubic root of 42974390 is about 350.2702402693.

The spelling of 42974390 in words is "forty-two million, nine hundred seventy-four thousand, three hundred ninety".