290888420 has 48 divisors (see below), whose sum is σ = 624734208. Its totient is φ = 113742720.

The previous prime is 290888387. The next prime is 290888453. The reversal of 290888420 is 24888092.

It is an interprime number because it is at equal distance from previous prime (290888387) and next prime (290888453).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179534 + ... + 181146.

It is an arithmetic number, because the mean of its divisors is an integer number (13015296).

Almost surely, 2^290888420 is an apocalyptic number.

290888420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290888420 is an abundant number, since it is smaller than the sum of its proper divisors (333845788).

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

290888420 is a wasteful number, since it uses less digits than its factorization.

290888420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1818 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 290888420 is about 17055.4513279479. The cubic root of 290888420 is about 662.5858305790.

The spelling of 290888420 in words is "two hundred ninety million, eight hundred eighty-eight thousand, four hundred twenty".