140724138 has 8 divisors (see below), whose sum is σ = 281448288. Its totient is φ = 46908044.

The previous prime is 140724137. The next prime is 140724139. The reversal of 140724138 is 831427041.

It is an interprime number because it is at equal distance from previous prime (140724137) and next prime (140724139).

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

140724138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (140724131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11727006 + ... + 11727017.

It is an arithmetic number, because the mean of its divisors is an integer number (35181036).

Almost surely, 2^140724138 is an apocalyptic number.

140724138 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.

140724138 is a wasteful number, since it uses less digits than its factorization.

140724138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23454028.

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

The square root of 140724138 is about 11862.7205142834. The cubic root of 140724138 is about 520.1431287465.

The spelling of 140724138 in words is "one hundred forty million, seven hundred twenty-four thousand, one hundred thirty-eight".