1199513920 has 112 divisors (see below), whose sum is σ = 3127174848. Its totient is φ = 434626560.

The previous prime is 1199513911. The next prime is 1199513923. The reversal of 1199513920 is 293159911.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199513923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1523767 + ... + 1524553.

It is an arithmetic number, because the mean of its divisors is an integer number (27921204).

Almost surely, 2^1199513920 is an apocalyptic number.

1199513920 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 1199513920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1563587424).

1199513920 is an abundant number, since it is smaller than the sum of its proper divisors (1927660928).

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

1199513920 is a wasteful number, since it uses less digits than its factorization.

1199513920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 1199513920 is about 34633.9994802795. Note that the first 3 decimals coincide. The cubic root of 1199513920 is about 1062.5150672834.

The spelling of 1199513920 in words is "one billion, one hundred ninety-nine million, five hundred thirteen thousand, nine hundred twenty".