10890431 has 4 divisors (see below), whose sum is σ = 11363952. Its totient is φ = 10416912.

The previous prime is 10890427. The next prime is 10890433. The reversal of 10890431 is 13409801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13409801 = 19 ⋅705779.

It is a cyclic number.

It is not a de Polignac number, because 10890431 - 2² = 10890427 is a prime.

It is a super-2 number, since 2×10890431² = 237202974731522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10890431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10890433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236726 + ... + 236771.

It is an arithmetic number, because the mean of its divisors is an integer number (2840988).

Almost surely, 2^10890431 is an apocalyptic number.

10890431 is a deficient number, since it is larger than the sum of its proper divisors (473521).

10890431 is an equidigital number, since it uses as much as digits as its factorization.

10890431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473520.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 10890431 is about 3300.0653023842. The cubic root of 10890431 is about 221.6571215920.

The spelling of 10890431 in words is "ten million, eight hundred ninety thousand, four hundred thirty-one".