2390731 has 8 divisors (see below), whose sum is σ = 2826720. Its totient is φ = 1978368.

The previous prime is 2390723. The next prime is 2390737. The reversal of 2390731 is 1370932.

2390731 = 273² + 274² + ... + 301².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2390731 - 2³ = 2390723 is a prime.

It is a super-2 number, since 2×2390731² = 11431189428722, which contains 22 as substring.

It is a Duffinian number.

2390731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2390696 and 2390705.

It is not an unprimeable number, because it can be changed into a prime (2390737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5686 + ... + 6091.

It is an arithmetic number, because the mean of its divisors is an integer number (353340).

2^2390731 is an apocalyptic number.

2390731 is a deficient number, since it is larger than the sum of its proper divisors (435989).

2390731 is a wasteful number, since it uses less digits than its factorization.

2390731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 2390731 is about 1546.1988875950. The cubic root of 2390731 is about 133.7140072598.

The spelling of 2390731 in words is "two million, three hundred ninety thousand, seven hundred thirty-one".