2278247840 has 48 divisors (see below), whose sum is σ = 5871670560. Its totient is φ = 828453120.

The previous prime is 2278247837. The next prime is 2278247893. The reversal of 2278247840 is 487428722.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 2278247791 and 2278247800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645470 + ... + 648989.

It is an arithmetic number, because the mean of its divisors is an integer number (122326470).

Almost surely, 2^2278247840 is an apocalyptic number.

2278247840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2278247840 is an abundant number, since it is smaller than the sum of its proper divisors (3593422720).

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

2278247840 is a wasteful number, since it uses less digits than its factorization.

2278247840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294485 (or 1294477 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 44.

The square root of 2278247840 is about 47730.9945423307. The cubic root of 2278247840 is about 1315.8316319000.

The spelling of 2278247840 in words is "two billion, two hundred seventy-eight million, two hundred forty-seven thousand, eight hundred forty".