138990548 has 48 divisors (see below), whose sum is σ = 263424000. Its totient is φ = 63967968.

The previous prime is 138990547. The next prime is 138990559. The reversal of 138990548 is 845099831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138990547) 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, 623165 + ... + 623387.

It is an arithmetic number, because the mean of its divisors is an integer number (5488000).

Almost surely, 2^138990548 is an apocalyptic number.

It is an amenable number.

138990548 is a deficient number, since it is larger than the sum of its proper divisors (124433452).

138990548 is a wasteful number, since it uses less digits than its factorization.

138990548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 138990548 is about 11789.4252616487. The cubic root of 138990548 is about 517.9984049086.

The spelling of 138990548 in words is "one hundred thirty-eight million, nine hundred ninety thousand, five hundred forty-eight".