1898297856 has 400 divisors, whose sum is σ = 6987302784. Its totient is φ = 499654656.

The previous prime is 1898297789. The next prime is 1898297867. The reversal of 1898297856 is 6587928981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1898297793 and 1898297802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3773701 + ... + 3774203.

Almost surely, 2^1898297856 is an apocalyptic number.

1898297856 is a gapful number since it is divisible by the number (16) 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 1898297856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3493651392).

1898297856 is an abundant number, since it is smaller than the sum of its proper divisors (5089004928).

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

1898297856 is an equidigital number, since it uses as much as digits as its factorization.

1898297856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 528 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The square root of 1898297856 is about 43569.4601297744. The cubic root of 1898297856 is about 1238.1923574706.

The spelling of 1898297856 in words is "one billion, eight hundred ninety-eight million, two hundred ninety-seven thousand, eight hundred fifty-six".