138379040 has 96 divisors (see below), whose sum is σ = 352429056. Its totient is φ = 51194880.

The previous prime is 138379037. The next prime is 138379051. The reversal of 138379040 is 40973831.

It is a super-2 number, since 2×138379040² = 38297517422643200, which contains 22 as substring.

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, 113474 + ... + 114686.

It is an arithmetic number, because the mean of its divisors is an integer number (3671136).

Almost surely, 2^138379040 is an apocalyptic number.

138379040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138379040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176214528).

138379040 is an abundant number, since it is smaller than the sum of its proper divisors (214050016).

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

138379040 is a wasteful number, since it uses less digits than its factorization.

138379040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 138379040 is about 11763.4620754266. The cubic root of 138379040 is about 517.2376197203.

The spelling of 138379040 in words is "one hundred thirty-eight million, three hundred seventy-nine thousand, forty".