55998378 has 24 divisors (see below), whose sum is σ = 125824608. Its totient is φ = 18665964.

The previous prime is 55998359. The next prime is 55998379. The reversal of 55998378 is 87389955.

55998378 is a `hidden beast` number, since 559 + 9 + 83 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (55998379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57126 + ... + 58097.

It is an arithmetic number, because the mean of its divisors is an integer number (5242692).

Almost surely, 2^55998378 is an apocalyptic number.

55998378 is an abundant number, since it is smaller than the sum of its proper divisors (69826230).

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

55998378 is a wasteful number, since it uses less digits than its factorization.

55998378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115240 (or 115228 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The square root of 55998378 is about 7483.2063983295. The cubic root of 55998378 is about 382.5825427398.

The spelling of 55998378 in words is "fifty-five million, nine hundred ninety-eight thousand, three hundred seventy-eight".