54206640 has 120 divisors (see below), whose sum is σ = 184541760. Its totient is φ = 14257152.

The previous prime is 54206629. The next prime is 54206641. The reversal of 54206640 is 4660245.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (54206641) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 56404 + ... + 57356.

It is an arithmetic number, because the mean of its divisors is an integer number (1537848).

Almost surely, 2^54206640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54206640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92270880).

54206640 is an abundant number, since it is smaller than the sum of its proper divisors (130335120).

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

54206640 is a wasteful number, since it uses less digits than its factorization.

54206640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 54206640 is about 7362.5158743462. The cubic root of 54206640 is about 378.4578310776.

Adding to 54206640 its reverse (4660245), we get a palindrome (58866885).

The spelling of 54206640 in words is "fifty-four million, two hundred six thousand, six hundred forty".