138703788 has 36 divisors (see below), whose sum is σ = 352654848. Its totient is φ = 45965280.

The previous prime is 138703783. The next prime is 138703793. The reversal of 138703788 is 887307831.

It is an interprime number because it is at equal distance from previous prime (138703783) and next prime (138703793).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (138703783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4908 + ... + 17363.

It is an arithmetic number, because the mean of its divisors is an integer number (9795968).

Almost surely, 2^138703788 is an apocalyptic number.

138703788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138703788 is an abundant number, since it is smaller than the sum of its proper divisors (213951060).

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

138703788 is a wasteful number, since it uses less digits than its factorization.

138703788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22454 (or 22449 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 138703788 is about 11777.2572358763. The cubic root of 138703788 is about 517.6419214478.

The spelling of 138703788 in words is "one hundred thirty-eight million, seven hundred three thousand, seven hundred eighty-eight".