138177982 has 24 divisors (see below), whose sum is σ = 216858096. Its totient is φ = 66025344.

The previous prime is 138177973. The next prime is 138178099. The reversal of 138177982 is 289771831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189703 + ... + 190429.

It is an arithmetic number, because the mean of its divisors is an integer number (9035754).

Almost surely, 2^138177982 is an apocalyptic number.

138177982 is a deficient number, since it is larger than the sum of its proper divisors (78680114).

138177982 is a wasteful number, since it uses less digits than its factorization.

138177982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 871 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The square root of 138177982 is about 11754.9131004870. The cubic root of 138177982 is about 516.9869912810.

The spelling of 138177982 in words is "one hundred thirty-eight million, one hundred seventy-seven thousand, nine hundred eighty-two".