138263355 has 24 divisors (see below), whose sum is σ = 248534832. Its totient is φ = 73739808.

The previous prime is 138263311. The next prime is 138263371. The reversal of 138263355 is 553362831.

138263355 is a `hidden beast` number, since 13 + 8 + 2 + 633 + 5 + 5 = 666.

It is not a de Polignac number, because 138263355 - 2¹⁰ = 138262331 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55684 + ... + 58113.

It is an arithmetic number, because the mean of its divisors is an integer number (10355618).

Almost surely, 2^138263355 is an apocalyptic number.

138263355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138263355 is a deficient number, since it is larger than the sum of its proper divisors (110271477).

138263355 is an equidigital number, since it uses as much as digits as its factorization.

138263355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113817 (or 113805 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 138263355 is about 11758.5439149582. The cubic root of 138263355 is about 517.0934424994.

The spelling of 138263355 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, three hundred fifty-five".