406885725 has 36 divisors (see below), whose sum is σ = 730236000. Its totient is φ = 216571680.

The previous prime is 406885723. The next prime is 406885733. The reversal of 406885725 is 527588604.

It is not a de Polignac number, because 406885725 - 2¹ = 406885723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406885723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 133266 + ... + 136284.

Almost surely, 2^406885725 is an apocalyptic number.

406885725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

406885725 is a deficient number, since it is larger than the sum of its proper divisors (323350275).

406885725 is a wasteful number, since it uses less digits than its factorization.

406885725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634 (or 3626 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 406885725 is about 20171.4086022766. The cubic root of 406885725 is about 741.0101404416.

The spelling of 406885725 in words is "four hundred six million, eight hundred eighty-five thousand, seven hundred twenty-five".