138072274 has 8 divisors (see below), whose sum is σ = 207968508. Its totient is φ = 68749440.

The previous prime is 138072223. The next prime is 138072287. The reversal of 138072274 is 472270831.

It can be written as a sum of positive squares in 2 ways, for example, as 124434025 + 13638249 = 11155^2 + 3693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142747 + ... + 143710.

Almost surely, 2^138072274 is an apocalyptic number.

138072274 is a deficient number, since it is larger than the sum of its proper divisors (69896234).

138072274 is a wasteful number, since it uses less digits than its factorization.

138072274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286700.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 138072274 is about 11750.4159075328. The cubic root of 138072274 is about 516.8551236662.

The spelling of 138072274 in words is "one hundred thirty-eight million, seventy-two thousand, two hundred seventy-four".