55280740 has 24 divisors (see below), whose sum is σ = 116235000. Its totient is φ = 22084608.

The previous prime is 55280723. The next prime is 55280741. The reversal of 55280740 is 4708255.

It can be written as a sum of positive squares in 4 ways, for example, as 18992164 + 36288576 = 4358^2 + 6024^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55280741) 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 7 ways as a sum of consecutive naturals, for example, 23874 + ... + 26086.

It is an arithmetic number, because the mean of its divisors is an integer number (4843125).

Almost surely, 2^55280740 is an apocalyptic number.

It is an amenable number.

55280740 is an abundant number, since it is smaller than the sum of its proper divisors (60954260).

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

55280740 is a wasteful number, since it uses less digits than its factorization.

55280740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471 (or 3469 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 55280740 is about 7435.1018822878. The cubic root of 55280740 is about 380.9412033278.

Adding to 55280740 its reverse (4708255), we get a palindrome (59988995).

The spelling of 55280740 in words is "fifty-five million, two hundred eighty thousand, seven hundred forty".