40028736 has 84 divisors (see below), whose sum is σ = 116480336. Its totient is φ = 12122880.

The previous prime is 40028713. The next prime is 40028767. The reversal of 40028736 is 63782004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22371 + ... + 24093.

Almost surely, 2^40028736 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 40028736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58240168).

40028736 is an abundant number, since it is smaller than the sum of its proper divisors (76451600).

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

40028736 is a wasteful number, since it uses less digits than its factorization.

40028736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40028736 is about 6326.8266927426. The cubic root of 40028736 is about 342.0770661797.

The spelling of 40028736 in words is "forty million, twenty-eight thousand, seven hundred thirty-six".