1404525990 has 128 divisors (see below), whose sum is σ = 4028497920. Its totient is φ = 306633600.

The previous prime is 1404525973. The next prime is 1404526003. The reversal of 1404525990 is 995254041.

It is a super-3 number, since 3×1404525990³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 512925 + ... + 515655.

It is an arithmetic number, because the mean of its divisors is an integer number (31472640).

Almost surely, 2^1404525990 is an apocalyptic number.

1404525990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1404525990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014248960).

1404525990 is an abundant number, since it is smaller than the sum of its proper divisors (2623971930).

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

1404525990 is a wasteful number, since it uses less digits than its factorization.

1404525990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 1404525990 is about 37477.0061504384. The cubic root of 1404525990 is about 1119.8931631723.

The spelling of 1404525990 in words is "one billion, four hundred four million, five hundred twenty-five thousand, nine hundred ninety".