4000028 has 12 divisors (see below), whose sum is σ = 7241640. Its totient is φ = 1930992.

The previous prime is 3999971. The next prime is 4000037. The reversal of 4000028 is 8200004.

4000028 is a modest number, since divided by 28 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3999976 and 4000021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17126 + ... + 17357.

It is an arithmetic number, because the mean of its divisors is an integer number (603470).

Almost surely, 2^4000028 is an apocalyptic number.

It is an amenable number.

4000028 is a deficient number, since it is larger than the sum of its proper divisors (3241612).

4000028 is a wasteful number, since it uses less digits than its factorization.

4000028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34516 (or 34514 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4000028 is about 2000.0069999878. The cubic root of 4000028 is about 158.7404755895.

The spelling of 4000028 in words is "four million, twenty-eight", and thus it is an aban number.