138330645 has 16 divisors (see below), whose sum is σ = 223290432. Its totient is φ = 73122560.

The previous prime is 138330641. The next prime is 138330677. The reversal of 138330645 is 546033831.

It is not a de Polignac number, because 138330645 - 2² = 138330641 is a prime.

It is a super-2 number, since 2×138330645² = 38270734692232050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138330641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39111 + ... + 42500.

It is an arithmetic number, because the mean of its divisors is an integer number (13955652).

Almost surely, 2^138330645 is an apocalyptic number.

138330645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138330645 is a deficient number, since it is larger than the sum of its proper divisors (84959787).

138330645 is a wasteful number, since it uses less digits than its factorization.

138330645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81732.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 138330645 is about 11761.4048905732. The cubic root of 138330645 is about 517.1773152280.

The spelling of 138330645 in words is "one hundred thirty-eight million, three hundred thirty thousand, six hundred forty-five".