1553798400 has 432 divisors, whose sum is σ = 6399257088. Its totient is φ = 322560000.

The previous prime is 1553798377. The next prime is 1553798413. The reversal of 1553798400 is 48973551.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1477875 + ... + 1478925.

Almost surely, 2^1553798400 is an apocalyptic number.

1553798400 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 1553798400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3199628544).

1553798400 is an abundant number, since it is smaller than the sum of its proper divisors (4845458688).

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

1553798400 is a wasteful number, since it uses less digits than its factorization.

1553798400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 1553798400 is about 39418.2495806194. The cubic root of 1553798400 is about 1158.2391039519.

The spelling of 1553798400 in words is "one billion, five hundred fifty-three million, seven hundred ninety-eight thousand, four hundred".