138606262 has 4 divisors (see below), whose sum is σ = 207909396. Its totient is φ = 69303130.

The previous prime is 138606229. The next prime is 138606263. The reversal of 138606262 is 262606831.

It is a happy number.

138606262 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×138606262² = 38423391731225288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138606263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34651564 + ... + 34651567.

It is an arithmetic number, because the mean of its divisors is an integer number (51977349).

Almost surely, 2^138606262 is an apocalyptic number.

138606262 is a deficient number, since it is larger than the sum of its proper divisors (69303134).

138606262 is an equidigital number, since it uses as much as digits as its factorization.

138606262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69303133.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 138606262 is about 11773.1160700980. The cubic root of 138606262 is about 517.5205708020.

The spelling of 138606262 in words is "one hundred thirty-eight million, six hundred six thousand, two hundred sixty-two".