53806440 has 32 divisors (see below), whose sum is σ = 161419680. Its totient is φ = 14348352.

The previous prime is 53806439. The next prime is 53806447. The reversal of 53806440 is 4460835.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 53806398 and 53806407.

It is not an unprimeable number, because it can be changed into a prime (53806447) 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 7 ways as a sum of consecutive naturals, for example, 224074 + ... + 224313.

It is an arithmetic number, because the mean of its divisors is an integer number (5044365).

Almost surely, 2^53806440 is an apocalyptic number.

It is an amenable number.

53806440 is an abundant number, since it is smaller than the sum of its proper divisors (107613240).

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

53806440 is a wasteful number, since it uses less digits than its factorization.

53806440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448401 (or 448397 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 53806440 is about 7335.2873154363. The cubic root of 53806440 is about 377.5241625982.

The spelling of 53806440 in words is "fifty-three million, eight hundred six thousand, four hundred forty".