236990 has 16 divisors (see below), whose sum is σ = 459648. Its totient is φ = 87456.

The previous prime is 236983. The next prime is 236993. The reversal of 236990 is 99632.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 236990.

It is not an unprimeable number, because it can be changed into a prime (236993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782 + ... + 1041.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2²³⁶⁹⁹⁰ is an apocalyptic number.

236990 is a deficient number, since it is larger than the sum of its proper divisors (222658).

236990 is a wasteful number, since it uses less digits than its factorization.

236990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 236990 is about 486.8161870768. The cubic root of 236990 is about 61.8837572205.

The spelling of 236990 in words is "two hundred thirty-six thousand, nine hundred ninety".