139909448 has 64 divisors (see below), whose sum is σ = 313528320. Its totient is φ = 57268800.

The previous prime is 139909447. The next prime is 139909489. The reversal of 139909448 is 844909931.

It is not an unprimeable number, because it can be changed into a prime (139909447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143603 + ... + 144573.

It is an arithmetic number, because the mean of its divisors is an integer number (4898880).

Almost surely, 2^139909448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139909448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156764160).

139909448 is an abundant number, since it is smaller than the sum of its proper divisors (173618872).

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

139909448 is a wasteful number, since it uses less digits than its factorization.

139909448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 139909448 is about 11828.3324268470. The cubic root of 139909448 is about 519.1374358671.

The spelling of 139909448 in words is "one hundred thirty-nine million, nine hundred nine thousand, four hundred forty-eight".