2278558620 has 384 divisors, whose sum is σ = 8241972480. Its totient is φ = 517570560.

The previous prime is 2278558619. The next prime is 2278558627. The reversal of 2278558620 is 268558722.

2278558620 is a `hidden beast` number, since 2 + 2 + 78 + 558 + 6 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278558627) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7279584 + ... + 7279896.

It is an arithmetic number, because the mean of its divisors is an integer number (21463470).

Almost surely, 2^2278558620 is an apocalyptic number.

2278558620 is a gapful number since it is divisible by the number (20) 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 2278558620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4120986240).

2278558620 is an abundant number, since it is smaller than the sum of its proper divisors (5963413860).

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

2278558620 is a wasteful number, since it uses less digits than its factorization.

2278558620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 2278558620 is about 47734.2499679214. The cubic root of 2278558620 is about 1315.8914608549.

The spelling of 2278558620 in words is "two billion, two hundred seventy-eight million, five hundred fifty-eight thousand, six hundred twenty".