40398953 has 16 divisors (see below), whose sum is σ = 49167360. Its totient is φ = 32403456.

The previous prime is 40398937. The next prime is 40398961. The reversal of 40398953 is 35989304.

It is a cyclic number.

It is not a de Polignac number, because 40398953 - 2⁴ = 40398937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40398953.

It is not an unprimeable number, because it can be changed into a prime (40398353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22088 + ... + 23846.

It is an arithmetic number, because the mean of its divisors is an integer number (3072960).

Almost surely, 2^40398953 is an apocalyptic number.

It is an amenable number.

40398953 is a deficient number, since it is larger than the sum of its proper divisors (8768407).

40398953 is a wasteful number, since it uses less digits than its factorization.

40398953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 40398953 is about 6356.0170704617. The cubic root of 40398953 is about 343.1284301191.

The spelling of 40398953 in words is "forty million, three hundred ninety-eight thousand, nine hundred fifty-three".