52720390 has 8 divisors (see below), whose sum is σ = 94896720. Its totient is φ = 21088152.

The previous prime is 52720387. The next prime is 52720399. The reversal of 52720390 is 9302725.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52720399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636010 + ... + 2636029.

It is an arithmetic number, because the mean of its divisors is an integer number (11862090).

Almost surely, 2^52720390 is an apocalyptic number.

52720390 is a deficient number, since it is larger than the sum of its proper divisors (42176330).

52720390 is a wasteful number, since it uses less digits than its factorization.

52720390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272046.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 52720390 is about 7260.8808005641. The cubic root of 52720390 is about 374.9668474395.

The spelling of 52720390 in words is "fifty-two million, seven hundred twenty thousand, three hundred ninety".