290628628 has 12 divisors (see below), whose sum is σ = 508737600. Its totient is φ = 145275032.

The previous prime is 290628619. The next prime is 290628661. The reversal of 290628628 is 826826092.

It is a happy number.

It is a congruent number.

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, 12423 + ... + 27121.

It is an arithmetic number, because the mean of its divisors is an integer number (42394800).

Almost surely, 2^290628628 is an apocalyptic number.

It is an amenable number.

290628628 is a deficient number, since it is larger than the sum of its proper divisors (218108972).

290628628 is a wasteful number, since it uses less digits than its factorization.

290628628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19646 (or 19644 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 290628628 is about 17047.8335280469. The cubic root of 290628628 is about 662.3885203665.

The spelling of 290628628 in words is "two hundred ninety million, six hundred twenty-eight thousand, six hundred twenty-eight".