55270740 has 96 divisors (see below), whose sum is σ = 187294464. Its totient is φ = 11888640.

The previous prime is 55270717. The next prime is 55270741. The reversal of 55270740 is 4707255.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55270698 and 55270707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55270741) 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, 3270 + ... + 11010.

It is an arithmetic number, because the mean of its divisors is an integer number (1950984).

Almost surely, 2^55270740 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 55270740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93647232).

55270740 is an abundant number, since it is smaller than the sum of its proper divisors (132023724).

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

55270740 is a wasteful number, since it uses less digits than its factorization.

55270740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7775 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 55270740 is about 7434.4293661316. The cubic root of 55270740 is about 380.9182318447.

Adding to 55270740 its reverse (4707255), we get a palindrome (59977995).

The spelling of 55270740 in words is "fifty-five million, two hundred seventy thousand, seven hundred forty".