290055636 has 72 divisors (see below), whose sum is σ = 792856064. Its totient is φ = 88879680.

The previous prime is 290055629. The next prime is 290055637. The reversal of 290055636 is 636550092.

290055636 is a `hidden beast` number, since 2 + 90 + 0 + 5 + 563 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 290055636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290055637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125685 + ... + 127971.

Almost surely, 2^290055636 is an apocalyptic number.

290055636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 290055636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396428032).

290055636 is an abundant number, since it is smaller than the sum of its proper divisors (502800428).

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

290055636 is a wasteful number, since it uses less digits than its factorization.

290055636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 290055636 is about 17031.0198167931. The cubic root of 290055636 is about 661.9529208981.

The spelling of 290055636 in words is "two hundred ninety million, fifty-five thousand, six hundred thirty-six".