138424395 has 24 divisors (see below), whose sum is σ = 229400496. Its totient is φ = 71274112.

The previous prime is 138424381. The next prime is 138424399. The reversal of 138424395 is 593424831.

It is not a de Polignac number, because 138424395 - 2¹⁰ = 138423371 is a prime.

It is a super-2 number, since 2×138424395² = 38322626262232050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138424399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7129 + ... + 18101.

It is an arithmetic number, because the mean of its divisors is an integer number (9558354).

Almost surely, 2^138424395 is an apocalyptic number.

138424395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138424395 is a deficient number, since it is larger than the sum of its proper divisors (90976101).

138424395 is a wasteful number, since it uses less digits than its factorization.

138424395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11039 (or 11010 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 138424395 is about 11765.3897088027. The cubic root of 138424395 is about 517.2941233394.

The spelling of 138424395 in words is "one hundred thirty-eight million, four hundred twenty-four thousand, three hundred ninety-five".