138535500 has 48 divisors (see below), whose sum is σ = 403419744. Its totient is φ = 36942400.

The previous prime is 138535489. The next prime is 138535519. The reversal of 138535500 is 5535831.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44679 + ... + 47678.

It is an arithmetic number, because the mean of its divisors is an integer number (8404578).

Almost surely, 2^138535500 is an apocalyptic number.

138535500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138535500 is an abundant number, since it is smaller than the sum of its proper divisors (264884244).

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

138535500 is a wasteful number, since it uses less digits than its factorization.

138535500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92379 (or 92367 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 138535500 is about 11770.1104497791. The cubic root of 138535500 is about 517.4324867000.

The spelling of 138535500 in words is "one hundred thirty-eight million, five hundred thirty-five thousand, five hundred".