40236140 has 96 divisors (see below), whose sum is σ = 101842944. Its totient is φ = 13063680.

The previous prime is 40236139. The next prime is 40236179. The reversal of 40236140 is 4163204.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316757 + ... + 316883.

It is an arithmetic number, because the mean of its divisors is an integer number (1060864).

Almost surely, 2^40236140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40236140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50921472).

40236140 is an abundant number, since it is smaller than the sum of its proper divisors (61606804).

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

40236140 is a wasteful number, since it uses less digits than its factorization.

40236140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40236140 is about 6343.1963551509. The cubic root of 40236140 is about 342.6668588639. Note that the first 3 decimals are identical.

Adding to 40236140 its reverse (4163204), we get a palindrome (44399344).

The spelling of 40236140 in words is "forty million, two hundred thirty-six thousand, one hundred forty".