53787820 has 12 divisors (see below), whose sum is σ = 112954464. Its totient is φ = 21515120.

The previous prime is 53787781. The next prime is 53787827. The reversal of 53787820 is 2878735.

It is not an unprimeable number, because it can be changed into a prime (53787827) 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, 1344676 + ... + 1344715.

It is an arithmetic number, because the mean of its divisors is an integer number (9412872).

Almost surely, 2^53787820 is an apocalyptic number.

It is an amenable number.

53787820 is an abundant number, since it is smaller than the sum of its proper divisors (59166644).

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

53787820 is a wasteful number, since it uses less digits than its factorization.

53787820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689400 (or 2689398 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 53787820 is about 7334.0179983417. The cubic root of 53787820 is about 377.4806095036.

The spelling of 53787820 in words is "fifty-three million, seven hundred eighty-seven thousand, eight hundred twenty".