138078500 has 48 divisors (see below), whose sum is σ = 344652672. Its totient is φ = 47340000.

The previous prime is 138078497. The next prime is 138078503. The reversal of 138078500 is 5870831.

It is an interprime number because it is at equal distance from previous prime (138078497) and next prime (138078503).

It is not an unprimeable number, because it can be changed into a prime (138078503) 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, 16226 + ... + 23225.

It is an arithmetic number, because the mean of its divisors is an integer number (7180264).

Almost surely, 2^138078500 is an apocalyptic number.

138078500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138078500 is an abundant number, since it is smaller than the sum of its proper divisors (206574172).

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

138078500 is a wasteful number, since it uses less digits than its factorization.

138078500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39477 (or 39465 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 138078500 is about 11750.6808313391. The cubic root of 138078500 is about 516.8628922827.

The spelling of 138078500 in words is "one hundred thirty-eight million, seventy-eight thousand, five hundred".