55283580 has 192 divisors, whose sum is σ = 193052160. Its totient is φ = 13017600.

The previous prime is 55283567. The next prime is 55283603. The reversal of 55283580 is 8538255.

55283580 is a `hidden beast` number, since 55 + 28 + 3 + 580 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 243427 + ... + 243653.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^55283580 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 55283580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96526080).

55283580 is an abundant number, since it is smaller than the sum of its proper divisors (137768580).

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

55283580 is a wasteful number, since it uses less digits than its factorization.

55283580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 55283580 is about 7435.2928657854. The cubic root of 55283580 is about 380.9477267239.

The spelling of 55283580 in words is "fifty-five million, two hundred eighty-three thousand, five hundred eighty".