138020284 has 12 divisors (see below), whose sum is σ = 241618608. Its totient is φ = 68986400.

The previous prime is 138020279. The next prime is 138020299. The reversal of 138020284 is 482020831.

It is a congruent number.

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, 16929 + ... + 23719.

It is an arithmetic number, because the mean of its divisors is an integer number (20134884).

Almost surely, 2^138020284 is an apocalyptic number.

It is an amenable number.

138020284 is a deficient number, since it is larger than the sum of its proper divisors (103598324).

138020284 is a wasteful number, since it uses less digits than its factorization.

138020284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11876 (or 11874 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 138020284 is about 11748.2034371218. The cubic root of 138020284 is about 516.7902429808.

The spelling of 138020284 in words is "one hundred thirty-eight million, twenty thousand, two hundred eighty-four".