138749356 has 24 divisors (see below), whose sum is σ = 249414480. Its totient is φ = 67512000.

The previous prime is 138749341. The next prime is 138749399. The reversal of 138749356 is 653947831.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20926 + ... + 26746.

It is an arithmetic number, because the mean of its divisors is an integer number (10392270).

Almost surely, 2^138749356 is an apocalyptic number.

It is an amenable number.

138749356 is a deficient number, since it is larger than the sum of its proper divisors (110665124).

138749356 is a wasteful number, since it uses less digits than its factorization.

138749356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985 (or 5983 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 138749356 is about 11779.1916530804. The cubic root of 138749356 is about 517.6986017658.

The spelling of 138749356 in words is "one hundred thirty-eight million, seven hundred forty-nine thousand, three hundred fifty-six".