138951258 has 8 divisors (see below), whose sum is σ = 277902528. Its totient is φ = 46317084.

The previous prime is 138951247. The next prime is 138951277. The reversal of 138951258 is 852159831.

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

138951258 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11579266 + ... + 11579277.

It is an arithmetic number, because the mean of its divisors is an integer number (34737816).

Almost surely, 2^138951258 is an apocalyptic number.

138951258 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.

138951258 is a wasteful number, since it uses less digits than its factorization.

138951258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23158548.

The product of its digits is 86400, while the sum is 42.

The square root of 138951258 is about 11787.7588200641. The cubic root of 138951258 is about 517.9495908569.

The spelling of 138951258 in words is "one hundred thirty-eight million, nine hundred fifty-one thousand, two hundred fifty-eight".