3990019 has 16 divisors (see below), whose sum is σ = 4855680. Its totient is φ = 3231360.

The previous prime is 3990011. The next prime is 3990029. The reversal of 3990019 is 9100993.

It is not a de Polignac number, because 3990019 - 2³ = 3990011 is a prime.

It is a super-2 number, since 2×3990019² = 31840503240722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992 + ... + 4114.

It is an arithmetic number, because the mean of its divisors is an integer number (303480).

Almost surely, 2^3990019 is an apocalyptic number.

3990019 is a deficient number, since it is larger than the sum of its proper divisors (865661).

3990019 is a wasteful number, since it uses less digits than its factorization.

3990019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 3990019 is about 1997.5031914868. The cubic root of 3990019 is about 158.6079631441.

The spelling of 3990019 in words is "three million, nine hundred ninety thousand, nineteen".