53399040 has 160 divisors (see below), whose sum is σ = 181193760. Its totient is φ = 13369344.

The previous prime is 53398999. The next prime is 53399041. The reversal of 53399040 is 4099335.

It is a tau number, because it is divible by the number of its divisors (160).

It is a junction number, because it is equal to n+sod(n) for n = 53398992 and 53399010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53399041) 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 15 ways as a sum of consecutive naturals, for example, 130356 + ... + 130764.

It is an arithmetic number, because the mean of its divisors is an integer number (1132461).

Almost surely, 2^53399040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90596880).

53399040 is an abundant number, since it is smaller than the sum of its proper divisors (127794720).

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

53399040 is a wasteful number, since it uses less digits than its factorization.

53399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 53399040 is about 7307.4646766166. The cubic root of 53399040 is about 376.5689289663.

The spelling of 53399040 in words is "fifty-three million, three hundred ninety-nine thousand, forty".