1285876400 has 30 divisors (see below), whose sum is σ = 3089319012. Its totient is φ = 514350400.

The previous prime is 1285876369. The next prime is 1285876451. The reversal of 1285876400 is 46785821.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1606946 + ... + 1607745.

Almost surely, 2^1285876400 is an apocalyptic number.

1285876400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285876400 is an abundant number, since it is smaller than the sum of its proper divisors (1803442612).

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

1285876400 is a wasteful number, since it uses less digits than its factorization.

1285876400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214709 (or 3214698 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 1285876400 is about 35859.1187844877. The cubic root of 1285876400 is about 1087.4260732765.

The spelling of 1285876400 in words is "one billion, two hundred eighty-five million, eight hundred seventy-six thousand, four hundred".