1899494400 has 132 divisors (see below), whose sum is σ = 6278181752. Its totient is φ = 506511360.

The previous prime is 1899494393. The next prime is 1899494411. The reversal of 1899494400 is 44949981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1899494400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64434 + ... + 89166.

Almost surely, 2^1899494400 is an apocalyptic number.

1899494400 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 1899494400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3139090876).

1899494400 is an abundant number, since it is smaller than the sum of its proper divisors (4378687352).

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

1899494400 is a wasteful number, since it uses less digits than its factorization.

1899494400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24766 (or 24743 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 1899494400 is about 43583.1894197751. The cubic root of 1899494400 is about 1238.4524572322.

The spelling of 1899494400 in words is "one billion, eight hundred ninety-nine million, four hundred ninety-four thousand, four hundred".