290804540 has 24 divisors (see below), whose sum is σ = 657666240. Its totient is φ = 107373888.

The previous prime is 290804531. The next prime is 290804543. The reversal of 290804540 is 45408092.

It is a super-2 number, since 2×290804540² = 169134560969223200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 290804497 and 290804506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290804543) 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, 558980 + ... + 559499.

It is an arithmetic number, because the mean of its divisors is an integer number (27402760).

Almost surely, 2^290804540 is an apocalyptic number.

290804540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290804540 is an abundant number, since it is smaller than the sum of its proper divisors (366861700).

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

290804540 is a wasteful number, since it uses less digits than its factorization.

290804540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118501 (or 1118499 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 290804540 is about 17052.9921128229. The cubic root of 290804540 is about 662.5221371504.

The spelling of 290804540 in words is "two hundred ninety million, eight hundred four thousand, five hundred forty".