406491744 has 48 divisors (see below), whose sum is σ = 1069443648. Its totient is φ = 135192192.

The previous prime is 406491733. The next prime is 406491749. The reversal of 406491744 is 447194604.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406491749) 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, 40299 + ... + 49365.

It is an arithmetic number, because the mean of its divisors is an integer number (22280076).

Almost surely, 2^406491744 is an apocalyptic number.

It is an amenable number.

406491744 is an abundant number, since it is smaller than the sum of its proper divisors (662951904).

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

406491744 is a wasteful number, since it uses less digits than its factorization.

406491744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9547 (or 9539 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 406491744 is about 20161.6404094508. The cubic root of 406491744 is about 740.7708937464.

The spelling of 406491744 in words is "four hundred six million, four hundred ninety-one thousand, seven hundred forty-four".