538868640 has 48 divisors (see below), whose sum is σ = 1697437728. Its totient is φ = 143698176.

The previous prime is 538868639. The next prime is 538868651. The reversal of 538868640 is 46868835.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×538868640² = 580758822350899200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 538868640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560842 + ... + 561801.

It is an arithmetic number, because the mean of its divisors is an integer number (35363286).

Almost surely, 2^538868640 is an apocalyptic number.

It is an amenable number.

538868640 is an abundant number, since it is smaller than the sum of its proper divisors (1158569088).

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

538868640 is a wasteful number, since it uses less digits than its factorization.

538868640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122661 (or 1122653 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 538868640 is about 23213.5443222271. The cubic root of 538868640 is about 813.7561867010.

It can be divided in two parts, 53886 and 8640, that added together give a palindrome (62526).

The spelling of 538868640 in words is "five hundred thirty-eight million, eight hundred sixty-eight thousand, six hundred forty".