405477090 has 56 divisors (see below), whose sum is σ = 1094307228. Its totient is φ = 108125280.

The previous prime is 405477073. The next prime is 405477151. The reversal of 405477090 is 90774504.

It is a happy number.

405477090 is a `hidden beast` number, since 40 + 547 + 70 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 360278361 + 45198729 = 18981^2 + 6723^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20521 + ... + 35100.

Almost surely, 2^405477090 is an apocalyptic number.

405477090 is an abundant number, since it is smaller than the sum of its proper divisors (688830138).

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

405477090 is an equidigital number, since it uses as much as digits as its factorization.

405477090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55646 (or 55631 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 405477090 is about 20136.4617050762. The cubic root of 405477090 is about 740.1540280787.

The spelling of 405477090 in words is "four hundred five million, four hundred seventy-seven thousand, ninety".