55278300 has 144 divisors (see below), whose sum is σ = 199487232. Its totient is φ = 11481600.

The previous prime is 55278281. The next prime is 55278313. The reversal of 55278300 is 387255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 21904 + ... + 24296.

It is an arithmetic number, because the mean of its divisors is an integer number (1385328).

Almost surely, 2^55278300 is an apocalyptic number.

55278300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55278300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99743616).

55278300 is an abundant number, since it is smaller than the sum of its proper divisors (144208932).

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

55278300 is a wasteful number, since it uses less digits than its factorization.

55278300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 55278300 is about 7434.9377939563. The cubic root of 55278300 is about 380.9355985414.

The spelling of 55278300 in words is "fifty-five million, two hundred seventy-eight thousand, three hundred".