406244440 has 32 divisors (see below), whose sum is σ = 1044629280. Its totient is φ = 139283712.

The previous prime is 406244437. The next prime is 406244467. The reversal of 406244440 is 44442604.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 406244399 and 406244408.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 725157 + ... + 725716.

It is an arithmetic number, because the mean of its divisors is an integer number (32644665).

Almost surely, 2^406244440 is an apocalyptic number.

406244440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406244440 is an abundant number, since it is smaller than the sum of its proper divisors (638384840).

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

406244440 is a wasteful number, since it uses less digits than its factorization.

406244440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450891 (or 1450887 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

The square root of 406244440 is about 20155.5064436496. The cubic root of 406244440 is about 740.6206383217.

The spelling of 406244440 in words is "four hundred six million, two hundred forty-four thousand, four hundred forty".