42990340 has 12 divisors (see below), whose sum is σ = 90279756. Its totient is φ = 17196128.

The previous prime is 42990329. The next prime is 42990377. The reversal of 42990340 is 4309924.

It can be written as a sum of positive squares in 2 ways, for example, as 33942276 + 9048064 = 5826^2 + 3008^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074739 + ... + 1074778.

It is an arithmetic number, because the mean of its divisors is an integer number (7523313).

Almost surely, 2^42990340 is an apocalyptic number.

It is an amenable number.

42990340 is an abundant number, since it is smaller than the sum of its proper divisors (47289416).

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

42990340 is a wasteful number, since it uses less digits than its factorization.

42990340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149526 (or 2149524 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42990340 is about 6556.7019148349. The cubic root of 42990340 is about 350.3135693256.

The spelling of 42990340 in words is "forty-two million, nine hundred ninety thousand, three hundred forty".