290516660 has 48 divisors (see below), whose sum is σ = 699129984. Its totient is φ = 99335808.

The previous prime is 290516647. The next prime is 290516701. The reversal of 290516660 is 66615092.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 290516660.

It is a congruent number.

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, 52967 + ... + 58193.

It is an arithmetic number, because the mean of its divisors is an integer number (14565208).

Almost surely, 2^290516660 is an apocalyptic number.

290516660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290516660 is an abundant number, since it is smaller than the sum of its proper divisors (408613324).

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

290516660 is a wasteful number, since it uses less digits than its factorization.

290516660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640 (or 5638 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 290516660 is about 17044.5492753549. The cubic root of 290516660 is about 662.3034451913.

The spelling of 290516660 in words is "two hundred ninety million, five hundred sixteen thousand, six hundred sixty".