290440128 has 56 divisors (see below), whose sum is σ = 838321920. Its totient is φ = 88011520.

The previous prime is 290440127. The next prime is 290440177. The reversal of 290440128 is 821044092.

It is a junction number, because it is equal to n+sod(n) for n = 290440095 and 290440104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290440123) by changing a digit.

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, 66648 + ... + 70871.

Almost surely, 2^290440128 is an apocalyptic number.

It is an amenable number.

290440128 is an abundant number, since it is smaller than the sum of its proper divisors (547881792).

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

290440128 is a wasteful number, since it uses less digits than its factorization.

290440128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137545 (or 137535 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 290440128 is about 17042.3040695793. The cubic root of 290440128 is about 662.2452823090.

The spelling of 290440128 in words is "two hundred ninety million, four hundred forty thousand, one hundred twenty-eight".