53784378 has 32 divisors (see below), whose sum is σ = 119784000. Its totient is φ = 17888688.

The previous prime is 53784361. The next prime is 53784397. The reversal of 53784378 is 87348735.

53784378 is a `hidden beast` number, since 537 + 8 + 43 + 78 = 666.

It is a congruent number.

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, 33948 + ... + 35496.

It is an arithmetic number, because the mean of its divisors is an integer number (3743250).

Almost surely, 2^53784378 is an apocalyptic number.

53784378 is an abundant number, since it is smaller than the sum of its proper divisors (65999622).

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

53784378 is a wasteful number, since it uses less digits than its factorization.

53784378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203 (or 2197 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 53784378 is about 7333.7833346779. The cubic root of 53784378 is about 377.4725573958.

The spelling of 53784378 in words is "fifty-three million, seven hundred eighty-four thousand, three hundred seventy-eight".