50261640 has 256 divisors, whose sum is σ = 185068800. Its totient is φ = 10752000.

The previous prime is 50261599. The next prime is 50261663. The reversal of 50261640 is 4616205.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 50261640.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 497590 + ... + 497690.

It is an arithmetic number, because the mean of its divisors is an integer number (722925).

Almost surely, 2^50261640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50261640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92534400).

50261640 is an abundant number, since it is smaller than the sum of its proper divisors (134807160).

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

50261640 is a wasteful number, since it uses less digits than its factorization.

50261640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 50261640 is about 7089.5444141355. The cubic root of 50261640 is about 369.0446255912.

Adding to 50261640 its reverse (4616205), we get a palindrome (54877845).

It can be divided in two parts, 5026 and 1640, that added together give a palindrome (6666).

The spelling of 50261640 in words is "fifty million, two hundred sixty-one thousand, six hundred forty".