1285800396 has 12 divisors (see below), whose sum is σ = 3000200952. Its totient is φ = 428600128.

The previous prime is 1285800377. The next prime is 1285800401. The reversal of 1285800396 is 6930085821.

It is a tau number, because it is divible by the number of its divisors (12).

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, 53575005 + ... + 53575028.

It is an arithmetic number, because the mean of its divisors is an integer number (250016746).

Almost surely, 2^1285800396 is an apocalyptic number.

It is an amenable number.

1285800396 is an abundant number, since it is smaller than the sum of its proper divisors (1714400556).

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

1285800396 is a wasteful number, since it uses less digits than its factorization.

1285800396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107150040 (or 107150038 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 1285800396 is about 35858.0590104930. The cubic root of 1285800396 is about 1087.4046481070.

The spelling of 1285800396 in words is "one billion, two hundred eighty-five million, eight hundred thousand, three hundred ninety-six".