55342780 has 12 divisors (see below), whose sum is σ = 116219880. Its totient is φ = 22137104.

The previous prime is 55342757. The next prime is 55342783. The reversal of 55342780 is 8724355.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55342783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1383550 + ... + 1383589.

It is an arithmetic number, because the mean of its divisors is an integer number (9684990).

Almost surely, 2^55342780 is an apocalyptic number.

It is an amenable number.

55342780 is an abundant number, since it is smaller than the sum of its proper divisors (60877100).

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

55342780 is a wasteful number, since it uses less digits than its factorization.

55342780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767148 (or 2767146 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 55342780 is about 7439.2728139248. The cubic root of 55342780 is about 381.0836565382.

The spelling of 55342780 in words is "fifty-five million, three hundred forty-two thousand, seven hundred eighty".