139889816 has 16 divisors (see below), whose sum is σ = 286138440. Its totient is φ = 63586240.

The previous prime is 139889801. The next prime is 139889839. The reversal of 139889816 is 618988931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794741 + ... + 794916.

Almost surely, 2^139889816 is an apocalyptic number.

It is an amenable number.

139889816 is an abundant number, since it is smaller than the sum of its proper divisors (146248624).

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

139889816 is a wasteful number, since it uses less digits than its factorization.

139889816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589674 (or 1589670 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 139889816 is about 11827.5025258928. The cubic root of 139889816 is about 519.1131530589.

The spelling of 139889816 in words is "one hundred thirty-nine million, eight hundred eighty-nine thousand, eight hundred sixteen".