138952288 has 48 divisors (see below), whose sum is σ = 293706000. Its totient is φ = 64475136.

The previous prime is 138952277. The next prime is 138952337. The reversal of 138952288 is 882259831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37963 + ... + 41461.

It is an arithmetic number, because the mean of its divisors is an integer number (6118875).

Almost surely, 2^138952288 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 138952288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146853000).

138952288 is an abundant number, since it is smaller than the sum of its proper divisors (154753712).

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

138952288 is a wasteful number, since it uses less digits than its factorization.

138952288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599 (or 3591 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 138952288 is about 11787.8025093738. The cubic root of 138952288 is about 517.9508706505.

The spelling of 138952288 in words is "one hundred thirty-eight million, nine hundred fifty-two thousand, two hundred eighty-eight".