53893440 has 84 divisors (see below), whose sum is σ = 185380884. Its totient is φ = 14370816.

The previous prime is 53893403. The next prime is 53893447. The reversal of 53893440 is 4439835.

It can be written as a sum of positive squares in 2 ways, for example, as 31539456 + 22353984 = 5616^2 + 4728^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53893395 and 53893404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53893447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6477 + ... + 12236.

Almost surely, 2^53893440 is an apocalyptic number.

It is an amenable number.

53893440 is an abundant number, since it is smaller than the sum of its proper divisors (131487444).

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

53893440 is a wasteful number, since it uses less digits than its factorization.

53893440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18736 (or 18723 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 53893440 is about 7341.2151582691. The cubic root of 53893440 is about 377.7275268288.

It can be divided in two parts, 5 and 3893440, that added together give a triangular number (3893445 = T₂₇₉₀).

The spelling of 53893440 in words is "fifty-three million, eight hundred ninety-three thousand, four hundred forty".