138653232 has 40 divisors (see below), whose sum is σ = 361487280. Its totient is φ = 45792000.

The previous prime is 138653231. The next prime is 138653233. The reversal of 138653232 is 232356831.

It is an interprime number because it is at equal distance from previous prime (138653231) and next prime (138653233).

It is a junction number, because it is equal to n+sod(n) for n = 138653193 and 138653202.

It is not an unprimeable number, because it can be changed into a prime (138653231) 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 7 ways as a sum of consecutive naturals, for example, 8019 + ... + 18482.

It is an arithmetic number, because the mean of its divisors is an integer number (9037182).

Almost surely, 2^138653232 is an apocalyptic number.

138653232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138653232 is an abundant number, since it is smaller than the sum of its proper divisors (222834048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138653232 is a wasteful number, since it uses less digits than its factorization.

138653232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26621 (or 26615 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 138653232 is about 11775.1107001166. The cubic root of 138653232 is about 517.5790222159.

The spelling of 138653232 in words is "one hundred thirty-eight million, six hundred fifty-three thousand, two hundred thirty-two".