40028751 has 24 divisors (see below), whose sum is σ = 67695264. Its totient is φ = 22314240.

The previous prime is 40028713. The next prime is 40028767. The reversal of 40028751 is 15782004.

40028751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-40028751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40028771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5166 + ... + 10331.

It is an arithmetic number, because the mean of its divisors is an integer number (2820636).

Almost surely, 2^40028751 is an apocalyptic number.

40028751 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40028751 is the 5166-th pentagonal number.

40028751 is a deficient number, since it is larger than the sum of its proper divisors (27666513).

40028751 is a wasteful number, since it uses less digits than its factorization.

40028751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15551 (or 15548 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 40028751 is about 6326.8278781709. The cubic root of 40028751 is about 342.0771089086.

The spelling of 40028751 in words is "forty million, twenty-eight thousand, seven hundred fifty-one".