50028781 has 6 divisors (see below), whose sum is σ = 54990446. Its totient is φ = 45480600.

The previous prime is 50028779. The next prime is 50028787. The reversal of 50028781 is 18782005.

It can be written as a sum of positive squares in only one way, i.e., 44435556 + 5593225 = 6666^2 + 2365^2 .

It is not a de Polignac number, because 50028781 - 2¹ = 50028779 is a prime.

It is a super-2 number, since 2×50028781² = 5005757856691922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50028787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206610 + ... + 206851.

Almost surely, 2^50028781 is an apocalyptic number.

It is an amenable number.

50028781 is a deficient number, since it is larger than the sum of its proper divisors (4961665).

50028781 is a wasteful number, since it uses less digits than its factorization.

50028781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413483 (or 413472 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 50028781 is about 7073.1026431121. The cubic root of 50028781 is about 368.4738230458.

The spelling of 50028781 in words is "fifty million, twenty-eight thousand, seven hundred eighty-one".