42990900 has 72 divisors (see below), whose sum is σ = 127075200. Its totient is φ = 11216640.

The previous prime is 42990889. The next prime is 42990911. The reversal of 42990900 is 909924.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42990889) and next prime (42990911).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12576 + ... + 15624.

Almost surely, 2^42990900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42990900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63537600).

42990900 is an abundant number, since it is smaller than the sum of its proper divisors (84084300).

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

42990900 is a wasteful number, since it uses less digits than its factorization.

42990900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 42990900 is about 6556.7446190926. The cubic root of 42990900 is about 350.3150904018.

The spelling of 42990900 in words is "forty-two million, nine hundred ninety thousand, nine hundred".