53787840 has 112 divisors (see below), whose sum is σ = 174882048. Its totient is φ = 13999104.

The previous prime is 53787827. The next prime is 53787863. The reversal of 53787840 is 4878735.

It is a junction number, because it is equal to n+sod(n) for n = 53787792 and 53787801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40629 + ... + 41931.

Almost surely, 2^53787840 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 53787840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87441024).

53787840 is an abundant number, since it is smaller than the sum of its proper divisors (121094208).

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

53787840 is a wasteful number, since it uses less digits than its factorization.

53787840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 53787840 is about 7334.0193618506. The cubic root of 53787840 is about 377.4806562899.

The spelling of 53787840 in words is "fifty-three million, seven hundred eighty-seven thousand, eight hundred forty".