1404553840 has 40 divisors (see below), whose sum is σ = 3294507888. Its totient is φ = 556846080.

The previous prime is 1404553819. The next prime is 1404553873. The reversal of 1404553840 is 483554041.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1404553796 and 1404553805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68646 + ... + 86725.

Almost surely, 2^1404553840 is an apocalyptic number.

1404553840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1404553840 is an abundant number, since it is smaller than the sum of its proper divisors (1889954048).

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

1404553840 is a wasteful number, since it uses less digits than its factorization.

1404553840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155497 (or 155491 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 1404553840 is about 37477.3777097598. The cubic root of 1404553840 is about 1119.9005651519.

The spelling of 1404553840 in words is "one billion, four hundred four million, five hundred fifty-three thousand, eight hundred forty".