1902489984 has 64 divisors (see below), whose sum is σ = 5614998000. Its totient is φ = 634162176.

The previous prime is 1902489983. The next prime is 1902489997. The reversal of 1902489984 is 4899842091.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1902489984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902489983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271789 + ... + 278700.

Almost surely, 2^1902489984 is an apocalyptic number.

It is an amenable number.

1902489984 is an abundant number, since it is smaller than the sum of its proper divisors (3712508016).

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

1902489984 is an equidigital number, since it uses as much as digits as its factorization.

1902489984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550512 (or 550494 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 1902489984 is about 43617.5421590901. The cubic root of 1902489984 is about 1239.1031461479.

The spelling of 1902489984 in words is "one billion, nine hundred two million, four hundred eighty-nine thousand, nine hundred eighty-four".