40389528 has 32 divisors (see below), whose sum is σ = 104232960. Its totient is φ = 13028640.

The previous prime is 40389521. The next prime is 40389529. The reversal of 40389528 is 82598304.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40389521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26400 + ... + 27887.

It is an arithmetic number, because the mean of its divisors is an integer number (3257280).

Almost surely, 2^40389528 is an apocalyptic number.

It is an amenable number.

40389528 is an abundant number, since it is smaller than the sum of its proper divisors (63843432).

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

40389528 is a wasteful number, since it uses less digits than its factorization.

40389528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54327 (or 54323 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 40389528 is about 6355.2756037799. The cubic root of 40389528 is about 343.1017443039.

The spelling of 40389528 in words is "forty million, three hundred eighty-nine thousand, five hundred twenty-eight".