1989902574 has 24 divisors (see below), whose sum is σ = 4703406552. Its totient is φ = 603000720.

The previous prime is 1989902573. The next prime is 1989902611. The reversal of 1989902574 is 4752099891.

It is a self number, because there is not a number n which added to its sum of digits gives 1989902574.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989902573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5024809 + ... + 5025204.

It is an arithmetic number, because the mean of its divisors is an integer number (195975273).

Almost surely, 2^1989902574 is an apocalyptic number.

1989902574 is an abundant number, since it is smaller than the sum of its proper divisors (2713503978).

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

1989902574 is a wasteful number, since it uses less digits than its factorization.

1989902574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050032 (or 10050029 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 1989902574 is about 44608.3240438374. The cubic root of 1989902574 is about 1257.7971449512.

The spelling of 1989902574 in words is "one billion, nine hundred eighty-nine million, nine hundred two thousand, five hundred seventy-four".