290423990 has 16 divisors (see below), whose sum is σ = 545492448. Its totient is φ = 111118656.

The previous prime is 290423933. The next prime is 290423993. The reversal of 290423990 is 99324092.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290423993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631127 + ... + 631586.

It is an arithmetic number, because the mean of its divisors is an integer number (34093278).

Almost surely, 2^290423990 is an apocalyptic number.

290423990 is a deficient number, since it is larger than the sum of its proper divisors (255068458).

290423990 is a wasteful number, since it uses less digits than its factorization.

290423990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262743.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 290423990 is about 17041.8305941586. The cubic root of 290423990 is about 662.2330164278.

The spelling of 290423990 in words is "two hundred ninety million, four hundred twenty-three thousand, nine hundred ninety".