54136640 has 28 divisors (see below), whose sum is σ = 128913636. Its totient is φ = 21654528.

The previous prime is 54136637. The next prime is 54136651. The reversal of 54136640 is 4663145.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41576704 + 12559936 = 6448^2 + 3544^2 .

It is a congruent number.

It is an unprimeable number.

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, 84269 + ... + 84908.

Almost surely, 2^54136640 is an apocalyptic number.

It is an amenable number.

54136640 is an abundant number, since it is smaller than the sum of its proper divisors (74776996).

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

54136640 is a wasteful number, since it uses less digits than its factorization.

54136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169194 (or 169184 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 54136640 is about 7357.7605288566. The cubic root of 54136640 is about 378.2948531355.

Adding to 54136640 its reverse (4663145), we get a palindrome (58799785).

The spelling of 54136640 in words is "fifty-four million, one hundred thirty-six thousand, six hundred forty".