54638540 has 24 divisors (see below), whose sum is σ = 125172432. Its totient is φ = 19868480.

The previous prime is 54638531. The next prime is 54638557. The reversal of 54638540 is 4583645.

It is a self number, because there is not a number n which added to its sum of digits gives 54638540.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123959 + ... + 124398.

It is an arithmetic number, because the mean of its divisors is an integer number (5215518).

Almost surely, 2^54638540 is an apocalyptic number.

It is an amenable number.

54638540 is an abundant number, since it is smaller than the sum of its proper divisors (70533892).

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

54638540 is a wasteful number, since it uses less digits than its factorization.

54638540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248377 (or 248375 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 54638540 is about 7391.7886874558. The cubic root of 54638540 is about 379.4603142196.

The spelling of 54638540 in words is "fifty-four million, six hundred thirty-eight thousand, five hundred forty".