54543640 has 32 divisors (see below), whose sum is σ = 122974560. Its totient is φ = 21772800.

The previous prime is 54543617. The next prime is 54543647. The reversal of 54543640 is 4634545.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54543647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24160 + ... + 26320.

It is an arithmetic number, because the mean of its divisors is an integer number (3842955).

Almost surely, 2^54543640 is an apocalyptic number.

It is an amenable number.

54543640 is an abundant number, since it is smaller than the sum of its proper divisors (68430920).

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

54543640 is a wasteful number, since it uses less digits than its factorization.

54543640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 54543640 is about 7385.3666124303. The cubic root of 54543640 is about 379.2404959214.

The spelling of 54543640 in words is "fifty-four million, five hundred forty-three thousand, six hundred forty".