53780736 has 72 divisors (see below), whose sum is σ = 144224640. Its totient is φ = 17790976.

The previous prime is 53780731. The next prime is 53780747. The reversal of 53780736 is 63708735.

It is a junction number, because it is equal to n+sod(n) for n = 53780694 and 53780703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53780731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183406 + ... + 183698.

It is an arithmetic number, because the mean of its divisors is an integer number (2003120).

Almost surely, 2^53780736 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 53780736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72112320).

53780736 is an abundant number, since it is smaller than the sum of its proper divisors (90443904).

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

53780736 is a wasteful number, since it uses less digits than its factorization.

53780736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 53780736 is about 7333.5350275294. The cubic root of 53780736 is about 377.4640370401.

The spelling of 53780736 in words is "fifty-three million, seven hundred eighty thousand, seven hundred thirty-six".