290043240 has 32 divisors (see below), whose sum is σ = 870130080. Its totient is φ = 77344832.

The previous prime is 290043209. The next prime is 290043253. The reversal of 290043240 is 42340092.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 290043240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1208394 + ... + 1208633.

It is an arithmetic number, because the mean of its divisors is an integer number (27191565).

Almost surely, 2^290043240 is an apocalyptic number.

290043240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290043240 is an abundant number, since it is smaller than the sum of its proper divisors (580086840).

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

290043240 is a wasteful number, since it uses less digits than its factorization.

290043240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417041 (or 2417037 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 290043240 is about 17030.6558887202. The cubic root of 290043240 is about 661.9434908851.

The spelling of 290043240 in words is "two hundred ninety million, forty-three thousand, two hundred forty".