1285445304 has 192 divisors, whose sum is σ = 4305974400. Its totient is φ = 340588800.

The previous prime is 1285445303. The next prime is 1285445309. The reversal of 1285445304 is 4035445821.

It is a happy number.

1285445304 is a `hidden beast` number, since 1 + 2 + 85 + 44 + 530 + 4 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285445303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 192339 + ... + 198909.

It is an arithmetic number, because the mean of its divisors is an integer number (22426950).

Almost surely, 2^1285445304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285445304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152987200).

1285445304 is an abundant number, since it is smaller than the sum of its proper divisors (3020529096).

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

1285445304 is a wasteful number, since it uses less digits than its factorization.

1285445304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626 (or 6619 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 1285445304 is about 35853.1073130349. The cubic root of 1285445304 is about 1087.3045381565.

The spelling of 1285445304 in words is "one billion, two hundred eighty-five million, four hundred forty-five thousand, three hundred four".