403872398725 has 24 divisors (see below), whose sum is σ = 531682521480. Its totient is φ = 303276779520.

The previous prime is 403872398723. The next prime is 403872398773. The reversal of 403872398725 is 527893278304.

It can be written as a sum of positive squares in 12 ways, for example, as 798514564 + 403073884161 = 28258^2 + 634881^2 .

It is not a de Polignac number, because 403872398725 - 2¹ = 403872398723 is a prime.

It is a super-2 number, since 2×403872398725² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 403872398725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403872398723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1115320 + ... + 1432369.

It is an arithmetic number, because the mean of its divisors is an integer number (22153438395).

Almost surely, 2^403872398725 is an apocalyptic number.

It is an amenable number.

403872398725 is a deficient number, since it is larger than the sum of its proper divisors (127810122755).

403872398725 is a wasteful number, since it uses less digits than its factorization.

403872398725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548089 (or 2548084 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 403872398725 in words is "four hundred three billion, eight hundred seventy-two million, three hundred ninety-eight thousand, seven hundred twenty-five".