52020240 has 40 divisors (see below), whose sum is σ = 161263488. Its totient is φ = 13872000.

The previous prime is 52020217. The next prime is 52020257. The reversal of 52020240 is 4202025.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×52020240² = 5412210739315200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108136 + ... + 108615.

Almost surely, 2^52020240 is an apocalyptic number.

It is an amenable number.

52020240 is an abundant number, since it is smaller than the sum of its proper divisors (109243248).

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

52020240 is a wasteful number, since it uses less digits than its factorization.

52020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216767 (or 216761 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 52020240 is about 7212.5058058902. The cubic root of 52020240 is about 373.2995363396.

Adding to 52020240 its reverse (4202025), we get a palindrome (56222265).

The spelling of 52020240 in words is "fifty-two million, twenty thousand, two hundred forty".