2278623240 has 48 divisors (see below), whose sum is σ = 7405526700. Its totient is φ = 607632768.

The previous prime is 2278623229. The next prime is 2278623289. The reversal of 2278623240 is 423268722.

It is a happy number.

2278623240 is a `hidden beast` number, since 2 + 2 + 7 + 8 + 623 + 24 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2123919396 + 154703844 = 46086^2 + 12438^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2278623195 and 2278623204.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3164395 + ... + 3165114.

Almost surely, 2^2278623240 is an apocalyptic number.

2278623240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2278623240 is an abundant number, since it is smaller than the sum of its proper divisors (5126903460).

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

2278623240 is a wasteful number, since it uses less digits than its factorization.

2278623240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6329526 (or 6329519 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 2278623240 is about 47734.9268355991. The cubic root of 2278623240 is about 1315.9039003128.

The spelling of 2278623240 in words is "two billion, two hundred seventy-eight million, six hundred twenty-three thousand, two hundred forty".