40428028 has 12 divisors (see below), whose sum is σ = 71173872. Its totient is φ = 20092640.

The previous prime is 40427993. The next prime is 40428071. The reversal of 40428028 is 82082404.

It is a junction number, because it is equal to n+sod(n) for n = 40427987 and 40428005.

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, 29593 + ... + 30928.

It is an arithmetic number, because the mean of its divisors is an integer number (5931156).

Almost surely, 2^40428028 is an apocalyptic number.

It is an amenable number.

40428028 is a deficient number, since it is larger than the sum of its proper divisors (30745844).

40428028 is a wasteful number, since it uses less digits than its factorization.

40428028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60692 (or 60690 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 40428028 is about 6358.3038618801. The cubic root of 40428028 is about 343.2107265318.

The spelling of 40428028 in words is "forty million, four hundred twenty-eight thousand, twenty-eight".