16389490840 has 32 divisors (see below), whose sum is σ = 37145537280. Its totient is φ = 6507941632.

The previous prime is 16389490823. The next prime is 16389490861. The reversal of 16389490840 is 4809498361.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489912 + ... + 1500871.

It is an arithmetic number, because the mean of its divisors is an integer number (1160798040).

Almost surely, 2^16389490840 is an apocalyptic number.

16389490840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16389490840 is an abundant number, since it is smaller than the sum of its proper divisors (20756046440).

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

16389490840 is a wasteful number, since it uses less digits than its factorization.

16389490840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990931 (or 2990927 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 16389490840 in words is "sixteen billion, three hundred eighty-nine million, four hundred ninety thousand, eight hundred forty".