138008455 has 16 divisors (see below), whose sum is σ = 178657920. Its totient is φ = 101737728.

The previous prime is 138008443. The next prime is 138008459. The reversal of 138008455 is 554800831.

It is a cyclic number.

It is not a de Polignac number, because 138008455 - 2⁷ = 138008327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138008455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138008459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45259 + ... + 48211.

It is an arithmetic number, because the mean of its divisors is an integer number (11166120).

Almost surely, 2^138008455 is an apocalyptic number.

138008455 is a deficient number, since it is larger than the sum of its proper divisors (40649465).

138008455 is a wasteful number, since it uses less digits than its factorization.

138008455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 138008455 is about 11747.6999876572. The cubic root of 138008455 is about 516.7754787586.

The spelling of 138008455 in words is "one hundred thirty-eight million, eight thousand, four hundred fifty-five".