40140536 has 32 divisors (see below), whose sum is σ = 82270080. Its totient is φ = 18278400.

The previous prime is 40140511. The next prime is 40140539. The reversal of 40140536 is 63504104.

It is a happy number.

It is a super-2 number, since 2×40140536² = 3222525260734592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545 + ... + 8976.

It is an arithmetic number, because the mean of its divisors is an integer number (2570940).

Almost surely, 2^40140536 is an apocalyptic number.

It is an amenable number.

40140536 is an abundant number, since it is smaller than the sum of its proper divisors (42129544).

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

40140536 is a wasteful number, since it uses less digits than its factorization.

40140536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9575 (or 9571 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40140536 is about 6335.6559250010. The cubic root of 40140536 is about 342.3952431502.

The spelling of 40140536 in words is "forty million, one hundred forty thousand, five hundred thirty-six".