138443154 has 8 divisors (see below), whose sum is σ = 276886320. Its totient is φ = 46147716.

The previous prime is 138443147. The next prime is 138443161. The reversal of 138443154 is 451344831.

It is an interprime number because it is at equal distance from previous prime (138443147) and next prime (138443161).

It is a sphenic number, since it is the product of 3 distinct primes.

138443154 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11536924 + ... + 11536935.

It is an arithmetic number, because the mean of its divisors is an integer number (34610790).

Almost surely, 2^138443154 is an apocalyptic number.

138443154 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138443154 is a wasteful number, since it uses less digits than its factorization.

138443154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23073864.

The product of its digits is 23040, while the sum is 33.

The square root of 138443154 is about 11766.1868929573. The cubic root of 138443154 is about 517.3174898425.

Adding to 138443154 its reverse (451344831), we get a palindrome (589787985).

The spelling of 138443154 in words is "one hundred thirty-eight million, four hundred forty-three thousand, one hundred fifty-four".