53809440 has 48 divisors (see below), whose sum is σ = 169501248. Its totient is φ = 14349056.

The previous prime is 53809439. The next prime is 53809447. The reversal of 53809440 is 4490835.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×53809440² = 5790911666227200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53809447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55572 + ... + 56531.

It is an arithmetic number, because the mean of its divisors is an integer number (3531276).

Almost surely, 2^53809440 is an apocalyptic number.

It is an amenable number.

53809440 is an abundant number, since it is smaller than the sum of its proper divisors (115691808).

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

53809440 is a wasteful number, since it uses less digits than its factorization.

53809440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112121 (or 112113 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 53809440 is about 7335.4918035535. The cubic root of 53809440 is about 377.5311788057.

The spelling of 53809440 in words is "fifty-three million, eight hundred nine thousand, four hundred forty".