55280578 has 8 divisors (see below), whose sum is σ = 83517840. Its totient is φ = 27441300.

The previous prime is 55280551. The next prime is 55280597. The reversal of 55280578 is 87508255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55280578.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99148 + ... + 99703.

It is an arithmetic number, because the mean of its divisors is an integer number (10439730).

Almost surely, 2^55280578 is an apocalyptic number.

55280578 is a deficient number, since it is larger than the sum of its proper divisors (28237262).

55280578 is a wasteful number, since it uses less digits than its factorization.

55280578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198992.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 55280578 is about 7435.0909880108. The cubic root of 55280578 is about 380.9408312118.

It can be divided in two parts, 55 and 280578, that multiplied together give a triangular number (15431790 = T₅₅₅₅).

The spelling of 55280578 in words is "fifty-five million, two hundred eighty thousand, five hundred seventy-eight".