236868990 has 64 divisors (see below), whose sum is σ = 607590720. Its totient is φ = 58890240.

The previous prime is 236868979. The next prime is 236869021. The reversal of 236868990 is 99868632.

It is a super-2 number, since 2×236868990² = 112213836847240200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53460 + ... + 57720.

It is an arithmetic number, because the mean of its divisors is an integer number (9493605).

Almost surely, 2^236868990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 236868990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303795360).

236868990 is an abundant number, since it is smaller than the sum of its proper divisors (370721730).

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

236868990 is a wasteful number, since it uses less digits than its factorization.

236868990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 236868990 is about 15390.5487231612. The cubic root of 236868990 is about 618.7322255888.

The spelling of 236868990 in words is "two hundred thirty-six million, eight hundred sixty-eight thousand, nine hundred ninety".