53640428 has 12 divisors (see below), whose sum is σ = 94229520. Its totient is φ = 26717712.

The previous prime is 53640427. The next prime is 53640437. The reversal of 53640428 is 82404635.

It is a junction number, because it is equal to n+sod(n) for n = 53640394 and 53640403.

It is not an unprimeable number, because it can be changed into a prime (53640421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24443 + ... + 26546.

It is an arithmetic number, because the mean of its divisors is an integer number (7852460).

Almost surely, 2^53640428 is an apocalyptic number.

It is an amenable number.

53640428 is a deficient number, since it is larger than the sum of its proper divisors (40589092).

53640428 is a wasteful number, since it uses less digits than its factorization.

53640428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51256 (or 51254 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 53640428 is about 7323.9625886538. The cubic root of 53640428 is about 377.1354971726.

The spelling of 53640428 in words is "fifty-three million, six hundred forty thousand, four hundred twenty-eight".