53729820 has 72 divisors (see below), whose sum is σ = 168255360. Its totient is φ = 13864320.

The previous prime is 53729783. The next prime is 53729839. The reversal of 53729820 is 2892735.

It is a happy number.

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

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, 766 + ... + 10394.

It is an arithmetic number, because the mean of its divisors is an integer number (2336880).

Almost surely, 2^53729820 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 53729820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84127680).

53729820 is an abundant number, since it is smaller than the sum of its proper divisors (114525540).

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

53729820 is a wasteful number, since it uses less digits than its factorization.

53729820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9675 (or 9670 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 53729820 is about 7330.0627555295. The cubic root of 53729820 is about 377.3448802031.

The spelling of 53729820 in words is "fifty-three million, seven hundred twenty-nine thousand, eight hundred twenty".