42890397 has 8 divisors (see below), whose sum is σ = 62386080. Its totient is φ = 25994160.

The previous prime is 42890389. The next prime is 42890399. The reversal of 42890397 is 79309824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42890397 - 2³ = 42890389 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42890399) 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, 649822 + ... + 649887.

It is an arithmetic number, because the mean of its divisors is an integer number (7798260).

Almost surely, 2^42890397 is an apocalyptic number.

It is an amenable number.

42890397 is a deficient number, since it is larger than the sum of its proper divisors (19495683).

42890397 is a wasteful number, since it uses less digits than its factorization.

42890397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299723.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 42890397 is about 6549.0760417024. The cubic root of 42890397 is about 350.0418915844.

The spelling of 42890397 in words is "forty-two million, eight hundred ninety thousand, three hundred ninety-seven".