1225844928 has 560 divisors, whose sum is σ = 4708940544. Its totient is φ = 306063360.

The previous prime is 1225844887. The next prime is 1225844933. The reversal of 1225844928 is 8294485221.

1225844928 is a `hidden beast` number, since 1 + 2 + 2 + 584 + 49 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 14769175 + ... + 14769257.

Almost surely, 2^1225844928 is an apocalyptic number.

1225844928 is a gapful number since it is divisible by the number (18) 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 1225844928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354470272).

1225844928 is an abundant number, since it is smaller than the sum of its proper divisors (3483095616).

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

1225844928 is a wasteful number, since it uses less digits than its factorization.

1225844928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 143 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 1225844928 is about 35012.0683193667. The cubic root of 1225844928 is about 1070.2334273968.

The spelling of 1225844928 in words is "one billion, two hundred twenty-five million, eight hundred forty-four thousand, nine hundred twenty-eight".