55276890 has 64 divisors (see below), whose sum is σ = 143475840. Its totient is φ = 13582080.

The previous prime is 55276873. The next prime is 55276901. The reversal of 55276890 is 9867255.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19780 + ... + 22400.

It is an arithmetic number, because the mean of its divisors is an integer number (2241810).

Almost surely, 2^55276890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55276890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71737920).

55276890 is an abundant number, since it is smaller than the sum of its proper divisors (88198950).

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

55276890 is a wasteful number, since it uses less digits than its factorization.

55276890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 55276890 is about 7434.8429707695. The cubic root of 55276890 is about 380.9323596348.

The spelling of 55276890 in words is "fifty-five million, two hundred seventy-six thousand, eight hundred ninety".