1228545816 has 16 divisors (see below), whose sum is σ = 3071364600. Its totient is φ = 409515264.

The previous prime is 1228545797. The next prime is 1228545823. The reversal of 1228545816 is 6185458221.

It is a super-2 number, since 2×1228545816² = 3018649644022211712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25594681 + ... + 25594728.

Almost surely, 2^1228545816 is an apocalyptic number.

It is an amenable number.

1228545816 is an abundant number, since it is smaller than the sum of its proper divisors (1842818784).

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

1228545816 is a wasteful number, since it uses less digits than its factorization.

1228545816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51189418 (or 51189414 counting only the distinct ones).

The product of its digits is 153600, while the sum is 42.

The square root of 1228545816 is about 35050.6179118143. The cubic root of 1228545816 is about 1071.0188612430.

The spelling of 1228545816 in words is "one billion, two hundred twenty-eight million, five hundred forty-five thousand, eight hundred sixteen".