53273440 has 48 divisors (see below), whose sum is σ = 137304720. Its totient is φ = 19371520.

The previous prime is 53273399. The next prime is 53273449. The reversal of 53273440 is 4437235.

It is a junction number, because it is equal to n+sod(n) for n = 53273399 and 53273408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53273449) 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, 13375 + ... + 16894.

It is an arithmetic number, because the mean of its divisors is an integer number (2860515).

Almost surely, 2^53273440 is an apocalyptic number.

It is an amenable number.

53273440 is an abundant number, since it is smaller than the sum of its proper divisors (84031280).

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

53273440 is a wasteful number, since it uses less digits than its factorization.

53273440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30295 (or 30287 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 53273440 is about 7298.8656652935. The cubic root of 53273440 is about 376.2734543129.

The spelling of 53273440 in words is "fifty-three million, two hundred seventy-three thousand, four hundred forty".