1019898450 has 144 divisors (see below), whose sum is σ = 2857959936. Its totient is φ = 260467200.

The previous prime is 1019898433. The next prime is 1019898463. The reversal of 1019898450 is 548989101.

1019898450 is a `hidden beast` number, since 1 + 0 + 198 + 9 + 8 + 450 = 666.

1019898450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 1019898396 and 1019898405.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1576027 + ... + 1576673.

It is an arithmetic number, because the mean of its divisors is an integer number (19846944).

Almost surely, 2^1019898450 is an apocalyptic number.

1019898450 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 1019898450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428979968).

1019898450 is an abundant number, since it is smaller than the sum of its proper divisors (1838061486).

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

1019898450 is a wasteful number, since it uses less digits than its factorization.

1019898450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 1019898450 is about 31935.8489788513. The cubic root of 1019898450 is about 1006.5893023939.

The spelling of 1019898450 in words is "one billion, nineteen million, eight hundred ninety-eight thousand, four hundred fifty".