1890997200 has 360 divisors, whose sum is σ = 6926119200. Its totient is φ = 477066240.

The previous prime is 1890997189. The next prime is 1890997223. The reversal of 1890997200 is 27990981.

It is a tau number, because it is divible by the number of its divisors (360).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

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, 6159447 + ... + 6159753.

It is an arithmetic number, because the mean of its divisors is an integer number (19239220).

Almost surely, 2^1890997200 is an apocalyptic number.

1890997200 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 1890997200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3463059600).

1890997200 is an abundant number, since it is smaller than the sum of its proper divisors (5035122000).

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

1890997200 is a wasteful number, since it uses less digits than its factorization.

1890997200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 1890997200 is about 43485.5976157624. The cubic root of 1890997200 is about 1236.6029985732.

The spelling of 1890997200 in words is "one billion, eight hundred ninety million, nine hundred ninety-seven thousand, two hundred".