40398751 has 2 divisors, whose sum is σ = 40398752. Its totient is φ = 40398750.

The previous prime is 40398733. The next prime is 40398811. The reversal of 40398751 is 15789304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40398751 - 2⁵ = 40398719 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40398751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40398551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20199375 + 20199376.

It is an arithmetic number, because the mean of its divisors is an integer number (20199376).

Almost surely, 2^40398751 is an apocalyptic number.

40398751 is a deficient number, since it is larger than the sum of its proper divisors (1).

40398751 is an equidigital number, since it uses as much as digits as its factorization.

40398751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 40398751 is about 6356.0011799873. The cubic root of 40398751 is about 343.1278582226.

The spelling of 40398751 in words is "forty million, three hundred ninety-eight thousand, seven hundred fifty-one".