4028831 has 4 divisors (see below), whose sum is σ = 4055664. Its totient is φ = 4002000.

The previous prime is 4028807. The next prime is 4028833. The reversal of 4028831 is 1388204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4028831 is a prime.

It is a super-2 number, since 2×4028831² = 32462958453122, 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 4028831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028833) 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, 13190 + ... + 13491.

It is an arithmetic number, because the mean of its divisors is an integer number (1013916).

Almost surely, 2^4028831 is an apocalyptic number.

4028831 is a deficient number, since it is larger than the sum of its proper divisors (26833).

4028831 is a wasteful number, since it uses less digits than its factorization.

4028831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26832.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 4028831 is about 2007.1948086820. The cubic root of 4028831 is about 159.1205788671.

The spelling of 4028831 in words is "four million, twenty-eight thousand, eight hundred thirty-one".