53776720 has 20 divisors (see below), whose sum is σ = 125031060. Its totient is φ = 21510656.

The previous prime is 53776711. The next prime is 53776721. The reversal of 53776720 is 2767735.

It can be written as a sum of positive squares in 2 ways, for example, as 20322064 + 33454656 = 4508^2 + 5784^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×53776720² = 5783871227916800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53776720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53776721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336025 + ... + 336184.

It is an arithmetic number, because the mean of its divisors is an integer number (6251553).

Almost surely, 2^53776720 is an apocalyptic number.

It is an amenable number.

53776720 is an abundant number, since it is smaller than the sum of its proper divisors (71254340).

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

53776720 is a wasteful number, since it uses less digits than its factorization.

53776720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672222 (or 672216 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 37.

The square root of 53776720 is about 7333.2612117666. The cubic root of 53776720 is about 377.4546412761.

The spelling of 53776720 in words is "fifty-three million, seven hundred seventy-six thousand, seven hundred twenty".