1144791990 has 96 divisors (see below), whose sum is σ = 3142994400. Its totient is φ = 288299520.

The previous prime is 1144791983. The next prime is 1144792003. The reversal of 1144791990 is 991974411.

1144791990 is a `hidden beast` number, since 11 + 447 + 9 + 199 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 664330 + ... + 666050.

It is an arithmetic number, because the mean of its divisors is an integer number (32739525).

Almost surely, 2^1144791990 is an apocalyptic number.

1144791990 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 1144791990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571497200).

1144791990 is an abundant number, since it is smaller than the sum of its proper divisors (1998202410).

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

1144791990 is a wasteful number, since it uses less digits than its factorization.

1144791990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142 (or 2139 counting only the distinct ones).

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

The square root of 1144791990 is about 33834.7748625582. The cubic root of 1144791990 is about 1046.1056009312.

The spelling of 1144791990 in words is "one billion, one hundred forty-four million, seven hundred ninety-one thousand, nine hundred ninety".