406128744 has 48 divisors (see below), whose sum is σ = 1257066720. Its totient is φ = 116036640.

The previous prime is 406128727. The next prime is 406128763. The reversal of 406128744 is 447821604.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 406128699 and 406128708.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402402 + ... + 403409.

It is an arithmetic number, because the mean of its divisors is an integer number (26188890).

Almost surely, 2^406128744 is an apocalyptic number.

It is an amenable number.

406128744 is an abundant number, since it is smaller than the sum of its proper divisors (850937976).

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

406128744 is a wasteful number, since it uses less digits than its factorization.

406128744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805830 (or 805823 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 406128744 is about 20152.6361551039. The cubic root of 406128744 is about 740.5503235288.

The spelling of 406128744 in words is "four hundred six million, one hundred twenty-eight thousand, seven hundred forty-four".