406522920 has 32 divisors (see below), whose sum is σ = 1219569120. Its totient is φ = 108406080.

The previous prime is 406522891. The next prime is 406522927. The reversal of 406522920 is 29225604.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (406522927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1693726 + ... + 1693965.

It is an arithmetic number, because the mean of its divisors is an integer number (38111535).

Almost surely, 2^406522920 is an apocalyptic number.

406522920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406522920 is an abundant number, since it is smaller than the sum of its proper divisors (813046200).

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

406522920 is a wasteful number, since it uses less digits than its factorization.

406522920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387705 (or 3387701 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 406522920 is about 20162.4135460019. The cubic root of 406522920 is about 740.7898311404.

The spelling of 406522920 in words is "four hundred six million, five hundred twenty-two thousand, nine hundred twenty".