138278050 has 24 divisors (see below), whose sum is σ = 257696676. Its totient is φ = 55203840.

The previous prime is 138277999. The next prime is 138278053. The reversal of 138278050 is 50872831.

138278050 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 119968209 + 18309841 = 10953^2 + 4279^2 .

It is a super-2 number, since 2×138278050² = 38241638223605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138277997 and 138278015.

It is not an unprimeable number, because it can be changed into a prime (138278053) 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, 26454 + ... + 31246.

Almost surely, 2^138278050 is an apocalyptic number.

138278050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138278050 is a deficient number, since it is larger than the sum of its proper divisors (119418626).

138278050 is a wasteful number, since it uses less digits than its factorization.

138278050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382 (or 5377 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 138278050 is about 11759.1687631397. The cubic root of 138278050 is about 517.1117612094. Note that the first 3 decimals are identical.

The spelling of 138278050 in words is "one hundred thirty-eight million, two hundred seventy-eight thousand, fifty".