54278220 has 24 divisors (see below), whose sum is σ = 151979184. Its totient is φ = 14474176.

The previous prime is 54278209. The next prime is 54278221. The reversal of 54278220 is 2287245.

It is a super-2 number, since 2×54278220² = 5892250332736800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (54278221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452259 + ... + 452378.

It is an arithmetic number, because the mean of its divisors is an integer number (6332466).

Almost surely, 2^54278220 is an apocalyptic number.

It is an amenable number.

54278220 is an abundant number, since it is smaller than the sum of its proper divisors (97700964).

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

54278220 is a wasteful number, since it uses less digits than its factorization.

54278220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904649 (or 904647 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 54278220 is about 7367.3753806902. The cubic root of 54278220 is about 378.6243426351.

The spelling of 54278220 in words is "fifty-four million, two hundred seventy-eight thousand, two hundred twenty".