1228178240 has 112 divisors (see below), whose sum is σ = 3118713600. Its totient is φ = 459343872.

The previous prime is 1228178239. The next prime is 1228178293. The reversal of 1228178240 is 428718221.

It is a self number, because there is not a number n which added to its sum of digits gives 1228178240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479042 + ... + 481598.

Almost surely, 2^1228178240 is an apocalyptic number.

1228178240 is a gapful number since it is divisible by the number (10) 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 1228178240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559356800).

1228178240 is an abundant number, since it is smaller than the sum of its proper divisors (1890535360).

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

1228178240 is a wasteful number, since it uses less digits than its factorization.

1228178240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 1228178240 is about 35045.3740171224. The cubic root of 1228178240 is about 1070.9120357335.

The spelling of 1228178240 in words is "one billion, two hundred twenty-eight million, one hundred seventy-eight thousand, two hundred forty".