53543784 has 32 divisors (see below), whose sum is σ = 152982720. Its totient is φ = 15298176.

The previous prime is 53543759. The next prime is 53543813. The reversal of 53543784 is 48734535.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159189 + ... + 159524.

It is an arithmetic number, because the mean of its divisors is an integer number (4780710).

Almost surely, 2^53543784 is an apocalyptic number.

It is an amenable number.

53543784 is an abundant number, since it is smaller than the sum of its proper divisors (99438936).

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

53543784 is a wasteful number, since it uses less digits than its factorization.

53543784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318729 (or 318725 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The square root of 53543784 is about 7317.3618196724. The cubic root of 53543784 is about 376.9088659066.

Subtracting from 53543784 its reverse (48734535), we obtain a square (4809249 = 2193²).

The spelling of 53543784 in words is "fifty-three million, five hundred forty-three thousand, seven hundred eighty-four".