40217028 has 12 divisors (see below), whose sum is σ = 93839760. Its totient is φ = 13405672.

The previous prime is 40217017. The next prime is 40217033. The reversal of 40217028 is 82071204.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 40216989 and 40217007.

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, 1675698 + ... + 1675721.

It is an arithmetic number, because the mean of its divisors is an integer number (7819980).

Almost surely, 2^40217028 is an apocalyptic number.

It is an amenable number.

40217028 is an abundant number, since it is smaller than the sum of its proper divisors (53622732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40217028 is a wasteful number, since it uses less digits than its factorization.

40217028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351426 (or 3351424 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 40217028 is about 6341.6896802035. The cubic root of 40217028 is about 342.6125951580.

The spelling of 40217028 in words is "forty million, two hundred seventeen thousand, twenty-eight".