290660140 has 12 divisors (see below), whose sum is σ = 610386336. Its totient is φ = 116264048.

The previous prime is 290660099. The next prime is 290660179. The reversal of 290660140 is 41066092.

It is a junction number, because it is equal to n+sod(n) for n = 290660099 and 290660108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7266484 + ... + 7266523.

It is an arithmetic number, because the mean of its divisors is an integer number (50865528).

Almost surely, 2^290660140 is an apocalyptic number.

290660140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290660140 is an abundant number, since it is smaller than the sum of its proper divisors (319726196).

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

290660140 is a wasteful number, since it uses less digits than its factorization.

290660140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14533016 (or 14533014 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 290660140 is about 17048.7577260046. The cubic root of 290660140 is about 662.4124597754.

The spelling of 290660140 in words is "two hundred ninety million, six hundred sixty thousand, one hundred forty".