1285919228 has 12 divisors (see below), whose sum is σ = 2454936792. Its totient is φ = 584508720.

The previous prime is 1285919197. The next prime is 1285919233. The reversal of 1285919228 is 8229195821.

It is a happy number.

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, 14612675 + ... + 14612762.

It is an arithmetic number, because the mean of its divisors is an integer number (204578066).

Almost surely, 2^1285919228 is an apocalyptic number.

It is an amenable number.

1285919228 is a deficient number, since it is larger than the sum of its proper divisors (1169017564).

1285919228 is a wasteful number, since it uses less digits than its factorization.

1285919228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29225452 (or 29225450 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 1285919228 is about 35859.7159497953. The cubic root of 1285919228 is about 1087.4381459161.

The spelling of 1285919228 in words is "one billion, two hundred eighty-five million, nine hundred nineteen thousand, two hundred twenty-eight".