3890731 has 4 divisors (see below), whose sum is σ = 4190032. Its totient is φ = 3591432.

The previous prime is 3890713. The next prime is 3890737. The reversal of 3890731 is 1370983.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3890731 - 2⁵ = 3890699 is a prime.

It is a super-2 number, since 2×3890731² = 30275575428722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3890693 and 3890702.

It is not an unprimeable number, because it can be changed into a prime (3890737) 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, 149631 + ... + 149656.

It is an arithmetic number, because the mean of its divisors is an integer number (1047508).

Almost surely, 2^3890731 is an apocalyptic number.

3890731 is a deficient number, since it is larger than the sum of its proper divisors (299301).

3890731 is a wasteful number, since it uses less digits than its factorization.

3890731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299300.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 3890731 is about 1972.4935994826. The cubic root of 3890731 is about 157.2812921382.

The spelling of 3890731 in words is "three million, eight hundred ninety thousand, seven hundred thirty-one".