138393754 has 16 divisors (see below), whose sum is σ = 211032000. Its totient is φ = 68058144.

The previous prime is 138393721. The next prime is 138393757. The reversal of 138393754 is 457393831.

It is a happy number.

It is a super-2 number, since 2×138393754² = 38305662292425032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138393754.

It is not an unprimeable number, because it can be changed into a prime (138393757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33469 + ... + 37375.

It is an arithmetic number, because the mean of its divisors is an integer number (13189500).

Almost surely, 2^138393754 is an apocalyptic number.

138393754 is a deficient number, since it is larger than the sum of its proper divisors (72638246).

138393754 is a wasteful number, since it uses less digits than its factorization.

138393754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4197.

The product of its digits is 272160, while the sum is 43.

The square root of 138393754 is about 11764.0874699230. The cubic root of 138393754 is about 517.2559518911.

The spelling of 138393754 in words is "one hundred thirty-eight million, three hundred ninety-three thousand, seven hundred fifty-four".