42990016 has 28 divisors (see below), whose sum is σ = 86346792. Its totient is φ = 21233408.

The previous prime is 42990011. The next prime is 42990043. The reversal of 42990016 is 61009924.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42990016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42990011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266 + ... + 9358.

It is an arithmetic number, because the mean of its divisors is an integer number (3083814).

Almost surely, 2^42990016 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 42990016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43173396).

42990016 is an abundant number, since it is smaller than the sum of its proper divisors (43356776).

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

42990016 is an equidigital number, since it uses as much as digits as its factorization.

42990016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8188 (or 8178 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 42990016 is about 6556.6772072445. The cubic root of 42990016 is about 350.3126892684.

The spelling of 42990016 in words is "forty-two million, nine hundred ninety thousand, sixteen".