55347740 has 48 divisors (see below), whose sum is σ = 135033024. Its totient is φ = 18662400.

The previous prime is 55347731. The next prime is 55347749. The reversal of 55347740 is 4774355.

It is an interprime number because it is at equal distance from previous prime (55347731) and next prime (55347749).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 55347740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55347749) 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 15 ways as a sum of consecutive naturals, for example, 5300 + ... + 11780.

It is an arithmetic number, because the mean of its divisors is an integer number (2813188).

Almost surely, 2^55347740 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 55347740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67516512).

55347740 is an abundant number, since it is smaller than the sum of its proper divisors (79685284).

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

55347740 is a wasteful number, since it uses less digits than its factorization.

55347740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6558 (or 6556 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 55347740 is about 7439.6061723723. The cubic root of 55347740 is about 381.0950408505.

The spelling of 55347740 in words is "fifty-five million, three hundred forty-seven thousand, seven hundred forty".