52290387 has 16 divisors (see below), whose sum is σ = 77714560. Its totient is φ = 34749000.

The previous prime is 52290349. The next prime is 52290401. The reversal of 52290387 is 78309225.

It is a happy number.

It is not a de Polignac number, because 52290387 - 2⁶ = 52290323 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (52290307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6012 + ... + 11862.

It is an arithmetic number, because the mean of its divisors is an integer number (4857160).

Almost surely, 2^52290387 is an apocalyptic number.

52290387 is a deficient number, since it is larger than the sum of its proper divisors (25424173).

52290387 is a wasteful number, since it uses less digits than its factorization.

52290387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191 (or 6185 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 52290387 is about 7231.2092349758. The cubic root of 52290387 is about 373.9446165619.

It can be divided in two parts, 522 and 90387, that added together give a palindrome (90909).

The spelling of 52290387 in words is "fifty-two million, two hundred ninety thousand, three hundred eighty-seven".