138102448 has 40 divisors (see below), whose sum is σ = 293083920. Its totient is φ = 62519040.

The previous prime is 138102443. The next prime is 138102479. The reversal of 138102448 is 844201831.

It is a super-2 number, since 2×138102448² = 38144572287185408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138102443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45886 + ... + 48802.

It is an arithmetic number, because the mean of its divisors is an integer number (7327098).

Almost surely, 2^138102448 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 138102448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146541960).

138102448 is an abundant number, since it is smaller than the sum of its proper divisors (154981472).

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

138102448 is a wasteful number, since it uses less digits than its factorization.

138102448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205 (or 3199 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 138102448 is about 11751.6997919450. The cubic root of 138102448 is about 516.8927717040.

The spelling of 138102448 in words is "one hundred thirty-eight million, one hundred two thousand, four hundred forty-eight".