42990428 has 24 divisors (see below), whose sum is σ = 83637120. Its totient is φ = 19200960.

The previous prime is 42990419. The next prime is 42990439. The reversal of 42990428 is 82409924.

It is a junction number, because it is equal to n+sod(n) for n = 42990391 and 42990400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11723 + ... + 14946.

It is an arithmetic number, because the mean of its divisors is an integer number (3484880).

Almost surely, 2^42990428 is an apocalyptic number.

It is an amenable number.

42990428 is a deficient number, since it is larger than the sum of its proper divisors (40646692).

42990428 is a wasteful number, since it uses less digits than its factorization.

42990428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26717 (or 26715 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 42990428 is about 6556.7086255224. The cubic root of 42990428 is about 350.3138083527.

The spelling of 42990428 in words is "forty-two million, nine hundred ninety thousand, four hundred twenty-eight".