138025724 has 12 divisors (see below), whose sum is σ = 241650024. Its totient is φ = 68982864.

The previous prime is 138025717. The next prime is 138025729. The reversal of 138025724 is 427520831.

138025724 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138025724² = 38102200971448352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138025729) 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, 5267 + ... + 17429.

It is an arithmetic number, because the mean of its divisors is an integer number (20137502).

Almost surely, 2^138025724 is an apocalyptic number.

It is an amenable number.

138025724 is a deficient number, since it is larger than the sum of its proper divisors (103624300).

138025724 is a wasteful number, since it uses less digits than its factorization.

138025724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15004 (or 15002 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 138025724 is about 11748.4349596021. The cubic root of 138025724 is about 516.7970325674.

The spelling of 138025724 in words is "one hundred thirty-eight million, twenty-five thousand, seven hundred twenty-four".