53781336 has 96 divisors (see below), whose sum is σ = 176286240. Its totient is φ = 14459904.

The previous prime is 53781323. The next prime is 53781367. The reversal of 53781336 is 63318735.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 53781336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5430 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (1836315).

Almost surely, 2^53781336 is an apocalyptic number.

53781336 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53781336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88143120).

53781336 is an abundant number, since it is smaller than the sum of its proper divisors (122504904).

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

53781336 is a wasteful number, since it uses less digits than its factorization.

53781336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313 (or 6306 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 53781336 is about 7333.5759353810. The cubic root of 53781336 is about 377.4654407496.

The spelling of 53781336 in words is "fifty-three million, seven hundred eighty-one thousand, three hundred thirty-six".