53433440 has 24 divisors (see below), whose sum is σ = 126236880. Its totient is φ = 21373312.

The previous prime is 53433437. The next prime is 53433449. The reversal of 53433440 is 4433435.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53433449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166820 + ... + 167139.

It is an arithmetic number, because the mean of its divisors is an integer number (5259870).

Almost surely, 2^53433440 is an apocalyptic number.

It is an amenable number.

53433440 is an abundant number, since it is smaller than the sum of its proper divisors (72803440).

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

53433440 is a wasteful number, since it uses less digits than its factorization.

53433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333974 (or 333966 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 53433440 is about 7309.8180551913. The cubic root of 53433440 is about 376.6497743053.

Adding to 53433440 its reverse (4433435), we get a palindrome (57866875).

The spelling of 53433440 in words is "fifty-three million, four hundred thirty-three thousand, four hundred forty".