138424670 has 8 divisors (see below), whose sum is σ = 249164424. Its totient is φ = 55369864.

The previous prime is 138424667. The next prime is 138424673. The reversal of 138424670 is 76424831.

It is an interprime number because it is at equal distance from previous prime (138424667) and next prime (138424673).

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

It is a super-2 number, since 2×138424670² = 38322778529217800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138424670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138424673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6921224 + ... + 6921243.

It is an arithmetic number, because the mean of its divisors is an integer number (31145553).

Almost surely, 2^138424670 is an apocalyptic number.

138424670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138424670 is a deficient number, since it is larger than the sum of its proper divisors (110739754).

138424670 is a wasteful number, since it uses less digits than its factorization.

138424670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13842474.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 138424670 is about 11765.4013956176. The cubic root of 138424670 is about 517.2944658990.

The spelling of 138424670 in words is "one hundred thirty-eight million, four hundred twenty-four thousand, six hundred seventy".