139669398 has 48 divisors (see below), whose sum is σ = 332304336. Its totient is φ = 42045120.

The previous prime is 139669379. The next prime is 139669403. The reversal of 139669398 is 893966931.

139669398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28840 + ... + 33332.

It is an arithmetic number, because the mean of its divisors is an integer number (6923007).

Almost surely, 2^139669398 is an apocalyptic number.

139669398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139669398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166152168).

139669398 is an abundant number, since it is smaller than the sum of its proper divisors (192634938).

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

139669398 is a wasteful number, since it uses less digits than its factorization.

139669398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4669 (or 4666 counting only the distinct ones).

The product of its digits is 1889568, while the sum is 54.

The square root of 139669398 is about 11818.1808244755. The cubic root of 139669398 is about 518.8403620978.

The spelling of 139669398 in words is "one hundred thirty-nine million, six hundred sixty-nine thousand, three hundred ninety-eight".