1228047372 has 48 divisors (see below), whose sum is σ = 3322260480. Its totient is φ = 391550544.

The previous prime is 1228047367. The next prime is 1228047389. The reversal of 1228047372 is 2737408221.

1228047372 is a `hidden beast` number, since 1 + 2 + 280 + 4 + 7 + 372 = 666.

It is a super-2 number, since 2×1228047372² = 3016200695752212768, which contains 22 as substring.

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

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, 244708 + ... + 249675.

It is an arithmetic number, because the mean of its divisors is an integer number (69213760).

Almost surely, 2^1228047372 is an apocalyptic number.

1228047372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228047372 is an abundant number, since it is smaller than the sum of its proper divisors (2094213108).

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

1228047372 is a wasteful number, since it uses less digits than its factorization.

1228047372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494419 (or 494411 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 1228047372 is about 35043.5068450633. The cubic root of 1228047372 is about 1070.8739975265.

The spelling of 1228047372 in words is "one billion, two hundred twenty-eight million, forty-seven thousand, three hundred seventy-two".