52409240 has 32 divisors (see below), whose sum is σ = 126992880. Its totient is φ = 19350912.

The previous prime is 52409233. The next prime is 52409243. The reversal of 52409240 is 4290425.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52409243) 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, 49874 + ... + 50913.

Almost surely, 2^52409240 is an apocalyptic number.

It is an amenable number.

52409240 is an abundant number, since it is smaller than the sum of its proper divisors (74583640).

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

52409240 is a wasteful number, since it uses less digits than its factorization.

52409240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100811 (or 100807 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 52409240 is about 7239.4226289118. The cubic root of 52409240 is about 374.2277202788.

Adding to 52409240 its reverse (4290425), we get a palindrome (56699665).

The spelling of 52409240 in words is "fifty-two million, four hundred nine thousand, two hundred forty".