40236720 has 80 divisors (see below), whose sum is σ = 125349120. Its totient is φ = 10676992.

The previous prime is 40236719. The next prime is 40236727. The reversal of 40236720 is 2763204.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (40236727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85927 + ... + 86393.

It is an arithmetic number, because the mean of its divisors is an integer number (1566864).

Almost surely, 2^40236720 is an apocalyptic number.

40236720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40236720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62674560).

40236720 is an abundant number, since it is smaller than the sum of its proper divisors (85112400).

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

40236720 is a wasteful number, since it uses less digits than its factorization.

40236720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 40236720 is about 6343.2420732619. The cubic root of 40236720 is about 342.6685053590.

Adding to 40236720 its reverse (2763204), we get a palindrome (42999924).

The spelling of 40236720 in words is "forty million, two hundred thirty-six thousand, seven hundred twenty".