55394280 has 192 divisors, whose sum is σ = 192628800. Its totient is φ = 14307840.

The previous prime is 55394257. The next prime is 55394293. The reversal of 55394280 is 8249355.

55394280 is a `hidden beast` number, since 5 + 539 + 42 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 398451 + ... + 398589.

It is an arithmetic number, because the mean of its divisors is an integer number (1003275).

Almost surely, 2^55394280 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 55394280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96314400).

55394280 is an abundant number, since it is smaller than the sum of its proper divisors (137234520).

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

55394280 is a wasteful number, since it uses less digits than its factorization.

55394280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 55394280 is about 7442.7333688639. The cubic root of 55394280 is about 381.2018274707.

The spelling of 55394280 in words is "fifty-five million, three hundred ninety-four thousand, two hundred eighty".