1898037450 has 72 divisors (see below), whose sum is σ = 5150006316. Its totient is φ = 501120000.

The previous prime is 1898037409. The next prime is 1898037457. The reversal of 1898037450 is 547308981.

It can be written as a sum of positive squares in 6 ways, for example, as 513974241 + 1384063209 = 22671^2 + 37203^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1898037396 and 1898037405.

It is not an unprimeable number, because it can be changed into a prime (1898037457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24570 + ... + 66330.

Almost surely, 2^1898037450 is an apocalyptic number.

1898037450 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 1898037450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2575003158).

1898037450 is an abundant number, since it is smaller than the sum of its proper divisors (3251968866).

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

1898037450 is a wasteful number, since it uses less digits than its factorization.

1898037450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41880 (or 41872 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1898037450 is about 43566.4716266994. The cubic root of 1898037450 is about 1238.1357370159.

The spelling of 1898037450 in words is "one billion, eight hundred ninety-eight million, thirty-seven thousand, four hundred fifty".