724140138 has 8 divisors (see below), whose sum is σ = 1448280288. Its totient is φ = 241380044.

The previous prime is 724140133. The next prime is 724140163. The reversal of 724140138 is 831041427.

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

724140138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (724140133) 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, 60345006 + ... + 60345017.

It is an arithmetic number, because the mean of its divisors is an integer number (181035036).

Almost surely, 2^724140138 is an apocalyptic number.

724140138 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.

724140138 is a wasteful number, since it uses less digits than its factorization.

724140138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120690028.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 724140138 is about 26909.8520620237. The cubic root of 724140138 is about 897.9955960651.

The spelling of 724140138 in words is "seven hundred twenty-four million, one hundred forty thousand, one hundred thirty-eight".