138954948 has 72 divisors (see below), whose sum is σ = 360989664. Its totient is φ = 41564160.

The previous prime is 138954941. The next prime is 138954953. The reversal of 138954948 is 849459831.

It is a self number, because there is not a number n which added to its sum of digits gives 138954948.

It is not an unprimeable number, because it can be changed into a prime (138954941) 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, 119940 + ... + 121092.

Almost surely, 2^138954948 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 138954948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180494832).

138954948 is an abundant number, since it is smaller than the sum of its proper divisors (222034716).

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

138954948 is a wasteful number, since it uses less digits than its factorization.

138954948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 1252 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 138954948 is about 11787.9153373275. The cubic root of 138954948 is about 517.9541757190.

The spelling of 138954948 in words is "one hundred thirty-eight million, nine hundred fifty-four thousand, nine hundred forty-eight".