138510764 has 36 divisors (see below), whose sum is σ = 294292656. Its totient is φ = 55866624.

The previous prime is 138510733. The next prime is 138510787. The reversal of 138510764 is 467015831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467 + ... + 16650.

It is an arithmetic number, because the mean of its divisors is an integer number (8174796).

Almost surely, 2^138510764 is an apocalyptic number.

138510764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138510764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147146328).

138510764 is an abundant number, since it is smaller than the sum of its proper divisors (155781892).

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

138510764 is a wasteful number, since it uses less digits than its factorization.

138510764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17162 (or 17143 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 138510764 is about 11769.0596055930. The cubic root of 138510764 is about 517.4016884044.

The spelling of 138510764 in words is "one hundred thirty-eight million, five hundred ten thousand, seven hundred sixty-four".