52915440 has 80 divisors (see below), whose sum is σ = 165801888. Its totient is φ = 13959168.

The previous prime is 52915427. The next prime is 52915477. The reversal of 52915440 is 4451925.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 52915398 and 52915407.

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, 22144 + ... + 24416.

Almost surely, 2^52915440 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 52915440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82900944).

52915440 is an abundant number, since it is smaller than the sum of its proper divisors (112886448).

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

52915440 is a wasteful number, since it uses less digits than its factorization.

52915440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2380 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 52915440 is about 7274.2999663198. The cubic root of 52915440 is about 375.4287008326.

It can be divided in two parts, 5291 and 5440, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 52915440 in words is "fifty-two million, nine hundred fifteen thousand, four hundred forty".