138995948 has 48 divisors (see below), whose sum is σ = 305524800. Its totient is φ = 54980352.

The previous prime is 138995933. The next prime is 138995999. The reversal of 138995948 is 849599831.

It is a junction number, because it is equal to n+sod(n) for n = 138995893 and 138995902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13940 + ... + 21732.

It is an arithmetic number, because the mean of its divisors is an integer number (6365100).

Almost surely, 2^138995948 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 138995948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152762400).

138995948 is an abundant number, since it is smaller than the sum of its proper divisors (166528852).

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

138995948 is a wasteful number, since it uses less digits than its factorization.

138995948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831 (or 7815 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 56.

The square root of 138995948 is about 11789.6542782221. The cubic root of 138995948 is about 518.0051131709.

The spelling of 138995948 in words is "one hundred thirty-eight million, nine hundred ninety-five thousand, nine hundred forty-eight".