404545140 has 36 divisors (see below), whose sum is σ = 1227120804. Its totient is φ = 107878656.

The previous prime is 404545117. The next prime is 404545151. The reversal of 404545140 is 41545404.

It can be written as a sum of positive squares in 2 ways, for example, as 225360144 + 179184996 = 15012^2 + 13386^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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, 1123557 + ... + 1123916.

It is an arithmetic number, because the mean of its divisors is an integer number (34086689).

Almost surely, 2^404545140 is an apocalyptic number.

It is an amenable number.

404545140 is an abundant number, since it is smaller than the sum of its proper divisors (822575664).

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

404545140 is a wasteful number, since it uses less digits than its factorization.

404545140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247488 (or 2247483 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 404545140 is about 20113.3075350625. The cubic root of 404545140 is about 739.5865355219.

The spelling of 404545140 in words is "four hundred four million, five hundred forty-five thousand, one hundred forty".