1553899940 has 24 divisors (see below), whose sum is σ = 3271726080. Its totient is φ = 619934048.

The previous prime is 1553899931. The next prime is 1553900053. The reversal of 1553899940 is 499983551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93770 + ... + 109089.

It is an arithmetic number, because the mean of its divisors is an integer number (136321920).

Almost surely, 2^1553899940 is an apocalyptic number.

1553899940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553899940 is an abundant number, since it is smaller than the sum of its proper divisors (1717826140).

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

1553899940 is a wasteful number, since it uses less digits than its factorization.

1553899940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203251 (or 203249 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The square root of 1553899940 is about 39419.5375416810. The cubic root of 1553899940 is about 1158.2643335306.

The spelling of 1553899940 in words is "one billion, five hundred fifty-three million, eight hundred ninety-nine thousand, nine hundred forty".