138277774 has 4 divisors (see below), whose sum is σ = 207416664. Its totient is φ = 69138886.

The previous prime is 138277759. The next prime is 138277823. The reversal of 138277774 is 477772831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34569442 + ... + 34569445.

It is an arithmetic number, because the mean of its divisors is an integer number (51854166).

Almost surely, 2^138277774 is an apocalyptic number.

138277774 is a deficient number, since it is larger than the sum of its proper divisors (69138890).

138277774 is an equidigital number, since it uses as much as digits as its factorization.

138277774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69138889.

The product of its digits is 460992, while the sum is 46.

The square root of 138277774 is about 11759.1570276104. The cubic root of 138277774 is about 517.1114171612. Note that the first 3 decimals are identical.

The spelling of 138277774 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, seven hundred seventy-four".