1285998496 has 24 divisors (see below), whose sum is σ = 2544544800. Its totient is φ = 639764928.

The previous prime is 1285998487. The next prime is 1285998499. The reversal of 1285998496 is 6948995821.

It is not an unprimeable number, because it can be changed into a prime (1285998499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94606 + ... + 107341.

It is an arithmetic number, because the mean of its divisors is an integer number (106022700).

Almost surely, 2^1285998496 is an apocalyptic number.

1285998496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1285998496 is a deficient number, since it is larger than the sum of its proper divisors (1258546304).

1285998496 is a wasteful number, since it uses less digits than its factorization.

1285998496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202156 (or 202148 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 61.

The square root of 1285998496 is about 35860.8211841280. The cubic root of 1285998496 is about 1087.4604897963.

The spelling of 1285998496 in words is "one billion, two hundred eighty-five million, nine hundred ninety-eight thousand, four hundred ninety-six".