407881625 has 8 divisors (see below), whose sum is σ = 509036424. Its totient is φ = 326305200.

The previous prime is 407881619. The next prime is 407881627. The reversal of 407881625 is 526188704.

It can be written as a sum of positive squares in 4 ways, for example, as 20894041 + 386987584 = 4571^2 + 19672^2 .

It is not a de Polignac number, because 407881625 - 2¹⁰ = 407880601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407881627) 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, 1631402 + ... + 1631651.

It is an arithmetic number, because the mean of its divisors is an integer number (63629553).

Almost surely, 2^407881625 is an apocalyptic number.

It is an amenable number.

407881625 is a deficient number, since it is larger than the sum of its proper divisors (101154799).

407881625 is an equidigital number, since it uses as much as digits as its factorization.

407881625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263068 (or 3263058 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 407881625 is about 20196.0794462688. The cubic root of 407881625 is about 741.6142172788.

The spelling of 407881625 in words is "four hundred seven million, eight hundred eighty-one thousand, six hundred twenty-five".