139808394 has 48 divisors (see below), whose sum is σ = 338161824. Its totient is φ = 41378400.

The previous prime is 139808387. The next prime is 139808399. The reversal of 139808394 is 493808931.

It is not an unprimeable number, because it can be changed into a prime (139808399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 304 + ... + 16724.

It is an arithmetic number, because the mean of its divisors is an integer number (7045038).

Almost surely, 2^139808394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139808394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169080912).

139808394 is an abundant number, since it is smaller than the sum of its proper divisors (198353430).

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

139808394 is a wasteful number, since it uses less digits than its factorization.

139808394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16483 (or 16480 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 139808394 is about 11824.0599626355. The cubic root of 139808394 is about 519.0124179817.

The spelling of 139808394 in words is "one hundred thirty-nine million, eight hundred eight thousand, three hundred ninety-four".