407725865 has 8 divisors (see below), whose sum is σ = 489430728. Its totient is φ = 326074240.

The previous prime is 407725859. The next prime is 407725867. The reversal of 407725865 is 568527704.

It can be written as a sum of positive squares in 4 ways, for example, as 89567296 + 318158569 = 9464^2 + 17837^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 407725865 - 2¹⁶ = 407660329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407725867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6125 + ... + 29205.

It is an arithmetic number, because the mean of its divisors is an integer number (61178841).

Almost surely, 2^407725865 is an apocalyptic number.

It is an amenable number.

407725865 is a deficient number, since it is larger than the sum of its proper divisors (81704863).

407725865 is a wasteful number, since it uses less digits than its factorization.

407725865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26619.

The product of its (nonzero) digits is 470400, while the sum is 44.

The square root of 407725865 is about 20192.2228840710. Note that the first 3 decimals coincide. The cubic root of 407725865 is about 741.5198038260.

The spelling of 407725865 in words is "four hundred seven million, seven hundred twenty-five thousand, eight hundred sixty-five".