138557782 has 32 divisors (see below), whose sum is σ = 233798400. Its totient is φ = 61041120.

The previous prime is 138557777. The next prime is 138557789. The reversal of 138557782 is 287755831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138557789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140463 + ... + 141445.

It is an arithmetic number, because the mean of its divisors is an integer number (7306200).

Almost surely, 2^138557782 is an apocalyptic number.

138557782 is a deficient number, since it is larger than the sum of its proper divisors (95240618).

138557782 is a wasteful number, since it uses less digits than its factorization.

138557782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its digits is 470400, while the sum is 46.

The square root of 138557782 is about 11771.0569618875. The cubic root of 138557782 is about 517.4602264312.

The spelling of 138557782 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, seven hundred eighty-two".