138424396 has 48 divisors (see below), whose sum is σ = 282256128. Its totient is φ = 58766400.

The previous prime is 138424381. The next prime is 138424399. The reversal of 138424396 is 693424831.

It is a happy number.

It is a super-2 number, since 2×138424396² = 38322626815929632, which contains 22 as substring.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41926 + ... + 45106.

It is an arithmetic number, because the mean of its divisors is an integer number (5880336).

Almost surely, 2^138424396 is an apocalyptic number.

It is an amenable number.

138424396 is an abundant number, since it is smaller than the sum of its proper divisors (143831732).

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

138424396 is a wasteful number, since it uses less digits than its factorization.

138424396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262 (or 3260 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 138424396 is about 11765.3897513002. The cubic root of 138424396 is about 517.2941245851.

The spelling of 138424396 in words is "one hundred thirty-eight million, four hundred twenty-four thousand, three hundred ninety-six".