53705780 has 48 divisors (see below), whose sum is σ = 120288000. Its totient is φ = 20082816.

The previous prime is 53705747. The next prime is 53705789. The reversal of 53705780 is 8750735.

It is a self number, because there is not a number n which added to its sum of digits gives 53705780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53705789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29126 + ... + 30914.

It is an arithmetic number, because the mean of its divisors is an integer number (2506000).

Almost surely, 2^53705780 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 53705780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60144000).

53705780 is an abundant number, since it is smaller than the sum of its proper divisors (66582220).

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

53705780 is a wasteful number, since it uses less digits than its factorization.

53705780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 53705780 is about 7328.4227498146. The cubic root of 53705780 is about 377.2885941149.

The spelling of 53705780 in words is "fifty-three million, seven hundred five thousand, seven hundred eighty".