290945655 has 128 divisors (see below), whose sum is σ = 694794240. Its totient is φ = 111559680.

The previous prime is 290945623. The next prime is 290945659. The reversal of 290945655 is 556549092.

It is a happy number.

It is not a de Polignac number, because 290945655 - 2⁵ = 290945623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 290945655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290945659) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 134059 + ... + 136211.

It is an arithmetic number, because the mean of its divisors is an integer number (5428080).

Almost surely, 2^290945655 is an apocalyptic number.

290945655 is an abundant number, since it is smaller than the sum of its proper divisors (403848585).

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

290945655 is a wasteful number, since it uses less digits than its factorization.

290945655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2192 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The square root of 290945655 is about 17057.1291546966. The cubic root of 290945655 is about 662.6292843691.

It can be divided in two parts, 290945 and 655, that added together give a square (291600 = 540²).

The spelling of 290945655 in words is "two hundred ninety million, nine hundred forty-five thousand, six hundred fifty-five".