1798947900 has 72 divisors (see below), whose sum is σ = 5783293040. Its totient is φ = 479718720.

The previous prime is 1798947877. The next prime is 1798947901. The reversal of 1798947900 is 97498971.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798947901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330439 + ... + 335838.

Almost surely, 2^1798947900 is an apocalyptic number.

1798947900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1798947900 is an abundant number, since it is smaller than the sum of its proper divisors (3984345140).

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

1798947900 is a wasteful number, since it uses less digits than its factorization.

1798947900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666300 (or 666287 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 1798947900 is about 42414.0059414340. The cubic root of 1798947900 is about 1216.2033497858.

The spelling of 1798947900 in words is "one billion, seven hundred ninety-eight million, nine hundred forty-seven thousand, nine hundred".