290139648 has 80 divisors (see below), whose sum is σ = 789592320. Its totient is φ = 94631936.

The previous prime is 290139631. The next prime is 290139673. The reversal of 290139648 is 846931092.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70183 + ... + 74201.

It is an arithmetic number, because the mean of its divisors is an integer number (9869904).

Almost surely, 2^290139648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290139648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394796160).

290139648 is an abundant number, since it is smaller than the sum of its proper divisors (499452672).

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

290139648 is an equidigital number, since it uses as much as digits as its factorization.

290139648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087 (or 4071 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 290139648 is about 17033.4860788976. The cubic root of 290139648 is about 662.0168242941.

The spelling of 290139648 in words is "two hundred ninety million, one hundred thirty-nine thousand, six hundred forty-eight".