55258740 has 96 divisors (see below), whose sum is σ = 177515520. Its totient is φ = 14256000.

The previous prime is 55258739. The next prime is 55258747. The reversal of 55258740 is 4785255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55258695 and 55258704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55258747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15090 + ... + 18390.

It is an arithmetic number, because the mean of its divisors is an integer number (1849120).

Almost surely, 2^55258740 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 55258740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88757760).

55258740 is an abundant number, since it is smaller than the sum of its proper divisors (122256780).

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

55258740 is a wasteful number, since it uses less digits than its factorization.

55258740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350 (or 3342 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 55258740 is about 7433.6222664324. The cubic root of 55258740 is about 380.8906624072.

The spelling of 55258740 in words is "fifty-five million, two hundred fifty-eight thousand, seven hundred forty".