55724020 has 48 divisors (see below), whose sum is σ = 128310336. Its totient is φ = 20160000.

The previous prime is 55723973. The next prime is 55724027. The reversal of 55724020 is 2042755.

It is a Smith number, since the sum of its digits (25) 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 (55724027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52495 + ... + 53545.

It is an arithmetic number, because the mean of its divisors is an integer number (2673132).

Almost surely, 2^55724020 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 55724020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64155168).

55724020 is an abundant number, since it is smaller than the sum of its proper divisors (72586316).

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

55724020 is a wasteful number, since it uses less digits than its factorization.

55724020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 55724020 is about 7464.8523093227. The cubic root of 55724020 is about 381.9567122901.

Adding to 55724020 its reverse (2042755), we get a palindrome (57766775).

The spelling of 55724020 in words is "fifty-five million, seven hundred twenty-four thousand, twenty".