138854078 has 16 divisors (see below), whose sum is σ = 228167280. Its totient is φ = 62851200.

The previous prime is 138854077. The next prime is 138854087. The reversal of 138854078 is 870458831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138854077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7793 + ... + 18396.

It is an arithmetic number, because the mean of its divisors is an integer number (14260455).

Almost surely, 2^138854078 is an apocalyptic number.

138854078 is a deficient number, since it is larger than the sum of its proper divisors (89313202).

138854078 is a wasteful number, since it uses less digits than its factorization.

138854078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26443.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 138854078 is about 11783.6360262866. The cubic root of 138854078 is about 517.8288145002.

The spelling of 138854078 in words is "one hundred thirty-eight million, eight hundred fifty-four thousand, seventy-eight".