138548040 has 32 divisors (see below), whose sum is σ = 415644480. Its totient is φ = 36946112.

The previous prime is 138548029. The next prime is 138548071. The reversal of 138548040 is 40845831.

It is a junction number, because it is equal to n+sod(n) for n = 138547992 and 138548010.

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, 577164 + ... + 577403.

It is an arithmetic number, because the mean of its divisors is an integer number (12988890).

Almost surely, 2^138548040 is an apocalyptic number.

138548040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138548040 is an abundant number, since it is smaller than the sum of its proper divisors (277096440).

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

138548040 is a wasteful number, since it uses less digits than its factorization.

138548040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154581 (or 1154577 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 138548040 is about 11770.6431430062. The cubic root of 138548040 is about 517.4480986012.

The spelling of 138548040 in words is "one hundred thirty-eight million, five hundred forty-eight thousand, forty".