290271864 has 32 divisors (see below), whose sum is σ = 726445440. Its totient is φ = 96655200.

The previous prime is 290271857. The next prime is 290271869. The reversal of 290271864 is 468172092.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290271869) 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, 18879 + ... + 30609.

It is an arithmetic number, because the mean of its divisors is an integer number (22701420).

Almost surely, 2^290271864 is an apocalyptic number.

290271864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

290271864 is an abundant number, since it is smaller than the sum of its proper divisors (436173576).

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

290271864 is a wasteful number, since it uses less digits than its factorization.

290271864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12771 (or 12767 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 290271864 is about 17037.3666979378. The cubic root of 290271864 is about 662.1173688937.

The spelling of 290271864 in words is "two hundred ninety million, two hundred seventy-one thousand, eight hundred sixty-four".