42902990 has 32 divisors (see below), whose sum is σ = 83474496. Its totient is φ = 15782400.

The previous prime is 42902941. The next prime is 42902999. The reversal of 42902990 is 9920924.

It is a self number, because there is not a number n which added to its sum of digits gives 42902990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42902999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51719 + ... + 52541.

It is an arithmetic number, because the mean of its divisors is an integer number (2608578).

Almost surely, 2^42902990 is an apocalyptic number.

42902990 is a deficient number, since it is larger than the sum of its proper divisors (40571506).

42902990 is a wasteful number, since it uses less digits than its factorization.

42902990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 42902990 is about 6550.0374044734. The cubic root of 42902990 is about 350.0761466975.

The spelling of 42902990 in words is "forty-two million, nine hundred two thousand, nine hundred ninety".