2278630840 has 32 divisors (see below), whose sum is σ = 5130090000. Its totient is φ = 910888704.

The previous prime is 2278630831. The next prime is 2278630873. The reversal of 2278630840 is 480368722.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2278630793 and 2278630802.

It is a congruent number.

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, 51196 + ... + 84724.

Almost surely, 2^2278630840 is an apocalyptic number.

2278630840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2278630840 is an abundant number, since it is smaller than the sum of its proper divisors (2851459160).

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

2278630840 is a wasteful number, since it uses less digits than its factorization.

2278630840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35239 (or 35235 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 2278630840 is about 47735.0064418137. The cubic root of 2278630840 is about 1315.9053633101.

The spelling of 2278630840 in words is "two billion, two hundred seventy-eight million, six hundred thirty thousand, eight hundred forty".