42990912 has 70 divisors (see below), whose sum is σ = 127453898. Its totient is φ = 14328576.

The previous prime is 42990911. The next prime is 42990917. The reversal of 42990912 is 21909924.

It can be written as a sum of positive squares in only one way, i.e., 31539456 + 11451456 = 5616^2 + 3384^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42990911) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1038 + ... + 9330.

Almost surely, 2^42990912 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 42990912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63726949).

42990912 is an abundant number, since it is smaller than the sum of its proper divisors (84462986).

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

42990912 is an equidigital number, since it uses as much as digits as its factorization.

42990912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317 (or 8298 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 42990912 is about 6556.7455341808. The cubic root of 42990912 is about 350.3151229961.

The spelling of 42990912 in words is "forty-two million, nine hundred ninety thousand, nine hundred twelve".