139188450 has 96 divisors (see below), whose sum is σ = 366405120. Its totient is φ = 34905600.

The previous prime is 139188437. The next prime is 139188461. The reversal of 139188450 is 54881931.

139188450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×139188450² = 38746849226805000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139188399 and 139188408.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 171646 + ... + 172454.

It is an arithmetic number, because the mean of its divisors is an integer number (3816720).

Almost surely, 2^139188450 is an apocalyptic number.

139188450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139188450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183202560).

139188450 is an abundant number, since it is smaller than the sum of its proper divisors (227216670).

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

139188450 is a wasteful number, since it uses less digits than its factorization.

139188450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 139188450 is about 11797.8154757565. The cubic root of 139188450 is about 518.2441393748.

The spelling of 139188450 in words is "one hundred thirty-nine million, one hundred eighty-eight thousand, four hundred fifty".