53372440 has 64 divisors (see below), whose sum is σ = 132412320. Its totient is φ = 19200000.

The previous prime is 53372419. The next prime is 53372453. The reversal of 53372440 is 4427335.

It is a junction number, because it is equal to n+sod(n) for n = 53372399 and 53372408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43840 + ... + 45040.

Almost surely, 2^53372440 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 53372440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66206160).

53372440 is an abundant number, since it is smaller than the sum of its proper divisors (79039880).

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

53372440 is a wasteful number, since it uses less digits than its factorization.

53372440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1320 counting only the distinct ones).

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

The square root of 53372440 is about 7305.6443932072. The cubic root of 53372440 is about 376.5063910305.

Adding to 53372440 its reverse (4427335), we get a palindrome (57799775).

It can be divided in two parts, 5337 and 2440, that added together give a palindrome (7777).

The spelling of 53372440 in words is "fifty-three million, three hundred seventy-two thousand, four hundred forty".