1799636940 has 60 divisors (see below), whose sum is σ = 5645532816. Its totient is φ = 479902752.

The previous prime is 1799636899. The next prime is 1799636941. The reversal of 1799636940 is 496369971.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (1799636941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 553824 + ... + 557063.

Almost surely, 2^1799636940 is an apocalyptic number.

1799636940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1799636940 is an abundant number, since it is smaller than the sum of its proper divisors (3845895876).

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

1799636940 is a wasteful number, since it uses less digits than its factorization.

1799636940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110908 (or 1110897 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 1799636940 is about 42422.1279522845. The cubic root of 1799636940 is about 1216.3586082725.

The spelling of 1799636940 in words is "one billion, seven hundred ninety-nine million, six hundred thirty-six thousand, nine hundred forty".