1199499840 has 560 divisors, whose sum is σ = 5328537984. Its totient is φ = 248832000.

The previous prime is 1199499839. The next prime is 1199499893. The reversal of 1199499840 is 489949911.

1199499840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1995540 + ... + 1996140.

Almost surely, 2^1199499840 is an apocalyptic number.

1199499840 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 1199499840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2664268992).

1199499840 is an abundant number, since it is smaller than the sum of its proper divisors (4129038144).

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

1199499840 is a wasteful number, since it uses less digits than its factorization.

1199499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 1199499840 is about 34633.7962112154. The cubic root of 1199499840 is about 1062.5109099687.

The spelling of 1199499840 in words is "one billion, one hundred ninety-nine million, four hundred ninety-nine thousand, eight hundred forty".