40038500 has 24 divisors (see below), whose sum is σ = 87445176. Its totient is φ = 16015200.

The previous prime is 40038497. The next prime is 40038503. The reversal of 40038500 is 583004.

It is an interprime number because it is at equal distance from previous prime (40038497) and next prime (40038503).

It can be written as a sum of positive squares in 4 ways, for example, as 2166784 + 37871716 = 1472^2 + 6154^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (40038503) 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, 39539 + ... + 40538.

It is an arithmetic number, because the mean of its divisors is an integer number (3643549).

Almost surely, 2^40038500 is an apocalyptic number.

It is an amenable number.

40038500 is an abundant number, since it is smaller than the sum of its proper divisors (47406676).

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

40038500 is a wasteful number, since it uses less digits than its factorization.

40038500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80096 (or 80084 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40038500 is about 6327.5982805485. The cubic root of 40038500 is about 342.1048776078.

The spelling of 40038500 in words is "forty million, thirty-eight thousand, five hundred".