405925020 has 120 divisors (see below), whose sum is σ = 1284079104. Its totient is φ = 107339904.

The previous prime is 405925019. The next prime is 405925027. The reversal of 405925020 is 20529504.

405925020 is a `hidden beast` number, since 4 + 0 + 592 + 50 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405925027) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 204754 + ... + 206726.

Almost surely, 2^405925020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 405925020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642039552).

405925020 is an abundant number, since it is smaller than the sum of its proper divisors (878154084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405925020 is a wasteful number, since it uses less digits than its factorization.

405925020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 2110 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 405925020 is about 20147.5809962387. The cubic root of 405925020 is about 740.4264768342.

The spelling of 405925020 in words is "four hundred five million, nine hundred twenty-five thousand, twenty".