1553398980 has 240 divisors, whose sum is σ = 5217657984. Its totient is φ = 345085440.

The previous prime is 1553398963. The next prime is 1553398981. The reversal of 1553398980 is 898933551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553398981) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 5906329 + ... + 5906591.

Almost surely, 2^1553398980 is an apocalyptic number.

1553398980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553398980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2608828992).

1553398980 is an abundant number, since it is smaller than the sum of its proper divisors (3664259004).

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

1553398980 is a wasteful number, since it uses less digits than its factorization.

1553398980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 1553398980 is about 39413.1828199652. The cubic root of 1553398980 is about 1158.1398496537.

The spelling of 1553398980 in words is "one billion, five hundred fifty-three million, three hundred ninety-eight thousand, nine hundred eighty".