138378850 has 24 divisors (see below), whose sum is σ = 258978960. Its totient is φ = 55008720.

The previous prime is 138378841. The next prime is 138378869. The reversal of 138378850 is 58873831.

It is a super-2 number, since 2×138378850² = 38297412254645000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138378797 and 138378806.

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, 340 + ... + 16639.

It is an arithmetic number, because the mean of its divisors is an integer number (10790790).

Almost surely, 2^138378850 is an apocalyptic number.

138378850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138378850 is a deficient number, since it is larger than the sum of its proper divisors (120600110).

138378850 is a wasteful number, since it uses less digits than its factorization.

138378850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154 (or 17149 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 138378850 is about 11763.4539995700. The cubic root of 138378850 is about 517.2373829908.

The spelling of 138378850 in words is "one hundred thirty-eight million, three hundred seventy-eight thousand, eight hundred fifty".