1869618940 has 48 divisors (see below), whose sum is σ = 4682184192. Its totient is φ = 613141056.

The previous prime is 1869618923. The next prime is 1869619001. The reversal of 1869618940 is 498169681.

1869618940 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287094 + ... + 293533.

It is an arithmetic number, because the mean of its divisors is an integer number (97545504).

Almost surely, 2^1869618940 is an apocalyptic number.

1869618940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1869618940 is an abundant number, since it is smaller than the sum of its proper divisors (2812565252).

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

1869618940 is a wasteful number, since it uses less digits than its factorization.

1869618940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580666 (or 580664 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 1869618940 is about 43239.0904159650. The cubic root of 1869618940 is about 1231.9252770993.

It can be divided in two parts, 18696 and 18940, that added together give a square (37636 = 194²).

The spelling of 1869618940 in words is "one billion, eight hundred sixty-nine million, six hundred eighteen thousand, nine hundred forty".