40502028 has 36 divisors (see below), whose sum is σ = 109935672. Its totient is φ = 11571840.

The previous prime is 40502023. The next prime is 40502039. The reversal of 40502028 is 82020504.

It is a super-2 number, since 2×40502028² = 3280828544225568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 40501995 and 40502013.

It is not an unprimeable number, because it can be changed into a prime (40502023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33853 + ... + 35028.

Almost surely, 2^40502028 is an apocalyptic number.

It is an amenable number.

40502028 is an abundant number, since it is smaller than the sum of its proper divisors (69433644).

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

40502028 is a wasteful number, since it uses less digits than its factorization.

40502028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68902 (or 68893 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40502028 is about 6364.1203634124. The cubic root of 40502028 is about 343.4200047209.

The spelling of 40502028 in words is "forty million, five hundred two thousand, twenty-eight".