290660022 has 64 divisors (see below), whose sum is σ = 658756800. Its totient is φ = 94982400.

The previous prime is 290660009. The next prime is 290660047. The reversal of 290660022 is 220066092.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747004 + ... + 747392.

It is an arithmetic number, because the mean of its divisors is an integer number (10293075).

Almost surely, 2^290660022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290660022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329378400).

290660022 is an abundant number, since it is smaller than the sum of its proper divisors (368096778).

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

290660022 is a wasteful number, since it uses less digits than its factorization.

290660022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 290660022 is about 17048.7542653415. The cubic root of 290660022 is about 662.4123701350.

The spelling of 290660022 in words is "two hundred ninety million, six hundred sixty thousand, twenty-two".