40333640 has 32 divisors (see below), whose sum is σ = 91152000. Its totient is φ = 16062144.

The previous prime is 40333633. The next prime is 40333649. The reversal of 40333640 is 4633304.

It is not an unprimeable number, because it can be changed into a prime (40333649) 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, 7451 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (2848500).

Almost surely, 2^40333640 is an apocalyptic number.

40333640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40333640 is an abundant number, since it is smaller than the sum of its proper divisors (50818360).

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

40333640 is a wasteful number, since it uses less digits than its factorization.

40333640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469 (or 4465 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 40333640 is about 6350.8771047785. The cubic root of 40333640 is about 342.9434184335.

Adding to 40333640 its reverse (4633304), we get a palindrome (44966944).

It can be divided in two parts, 403 and 33640, that added together give a palindrome (34043).

The spelling of 40333640 in words is "forty million, three hundred thirty-three thousand, six hundred forty".