40386028 has 12 divisors (see below), whose sum is σ = 70720552. Its totient is φ = 20180160.

The previous prime is 40386023. The next prime is 40386037. The reversal of 40386028 is 82068304.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (40386023) 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, 9076 + ... + 12772.

Almost surely, 2^40386028 is an apocalyptic number.

It is an amenable number.

40386028 is a deficient number, since it is larger than the sum of its proper divisors (30334524).

40386028 is a wasteful number, since it uses less digits than its factorization.

40386028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432 (or 6430 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 40386028 is about 6355.0002360346. Note that the first 3 decimals coincide. The cubic root of 40386028 is about 343.0918333951.

The spelling of 40386028 in words is "forty million, three hundred eighty-six thousand, twenty-eight".