405964044 has 18 divisors (see below), whose sum is σ = 1026186980. Its totient is φ = 135321336.

The previous prime is 405964033. The next prime is 405964057. The reversal of 405964044 is 440469504.

405964044 is a `hidden beast` number, since 4 + 0 + 5 + 9 + 640 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 11276779 = 405964044 / (4 + 0 + 5 + 9 + 6 + 4 + 0 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5638354 + ... + 5638425.

Almost surely, 2^405964044 is an apocalyptic number.

It is an amenable number.

405964044 is an abundant number, since it is smaller than the sum of its proper divisors (620222936).

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

405964044 is a wasteful number, since it uses less digits than its factorization.

405964044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11276789 (or 11276784 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 405964044 is about 20148.5494266957. The cubic root of 405964044 is about 740.4502032825.

The spelling of 405964044 in words is "four hundred five million, nine hundred sixty-four thousand, forty-four".