50289138 has 24 divisors (see below), whose sum is σ = 109760508. Its totient is φ = 16639872.

The previous prime is 50289137. The next prime is 50289157. The reversal of 50289138 is 83198205.

It can be written as a sum of positive squares in 2 ways, for example, as 50083929 + 205209 = 7077^2 + 453^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (50289133) 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, 7731 + ... + 12662.

Almost surely, 2^50289138 is an apocalyptic number.

50289138 is an abundant number, since it is smaller than the sum of its proper divisors (59471370).

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

50289138 is a wasteful number, since it uses less digits than its factorization.

50289138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20538 (or 20535 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 50289138 is about 7091.4834837289. The cubic root of 50289138 is about 369.1119144092. Note that the first 3 decimals are identical.

The spelling of 50289138 in words is "fifty million, two hundred eighty-nine thousand, one hundred thirty-eight".