53853640 has 16 divisors (see below), whose sum is σ = 121170780. Its totient is φ = 21541440.

The previous prime is 53853617. The next prime is 53853643. The reversal of 53853640 is 4635835.

It can be written as a sum of positive squares in 2 ways, for example, as 53846244 + 7396 = 7338^2 + 86^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53853596 and 53853605.

It is not an unprimeable number, because it can be changed into a prime (53853643) 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, 673131 + ... + 673210.

Almost surely, 2^53853640 is an apocalyptic number.

It is an amenable number.

53853640 is an abundant number, since it is smaller than the sum of its proper divisors (67317140).

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

53853640 is a wasteful number, since it uses less digits than its factorization.

53853640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346352 (or 1346348 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 53853640 is about 7338.5039347268. The cubic root of 53853640 is about 377.6345207176.

It can be divided in two parts, 5385 and 3640, that added together give a square (9025 = 95²).

The spelling of 53853640 in words is "fifty-three million, eight hundred fifty-three thousand, six hundred forty".