138974094 has 72 divisors (see below), whose sum is σ = 368751240. Its totient is φ = 37612512.

The previous prime is 138974093. The next prime is 138974107. The reversal of 138974094 is 490479831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138974093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12612 + ... + 20904.

It is an arithmetic number, because the mean of its divisors is an integer number (5121545).

Almost surely, 2^138974094 is an apocalyptic number.

138974094 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138974094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184375620).

138974094 is an abundant number, since it is smaller than the sum of its proper divisors (229777146).

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

138974094 is a wasteful number, since it uses less digits than its factorization.

138974094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334 (or 8324 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 138974094 is about 11788.7274122358. The cubic root of 138974094 is about 517.9779635135.

The spelling of 138974094 in words is "one hundred thirty-eight million, nine hundred seventy-four thousand, ninety-four".