40369728 has 112 divisors (see below), whose sum is σ = 124764800. Its totient is φ = 11515392.

The previous prime is 40369727. The next prime is 40369741. The reversal of 40369728 is 82796304.

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (40369727) 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, 65550 + ... + 66162.

Almost surely, 2^40369728 is an apocalyptic number.

40369728 is a gapful number since it is divisible by the number (48) 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 40369728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62382400).

40369728 is an abundant number, since it is smaller than the sum of its proper divisors (84395072).

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

40369728 is an equidigital number, since it uses as much as digits as its factorization.

40369728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 40369728 is about 6353.7176518948. The cubic root of 40369728 is about 343.0456693320.

The spelling of 40369728 in words is "forty million, three hundred sixty-nine thousand, seven hundred twenty-eight".