1285485788 has 24 divisors (see below), whose sum is σ = 2280600000. Its totient is φ = 633904128.

The previous prime is 1285485763. The next prime is 1285485863. The reversal of 1285485788 is 8875845821.

It is a happy number.

It is a super-2 number, since 2×1285485788² = 3304947422299961888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393056 + ... + 396312.

It is an arithmetic number, because the mean of its divisors is an integer number (95025000).

Almost surely, 2^1285485788 is an apocalyptic number.

It is an amenable number.

1285485788 is a deficient number, since it is larger than the sum of its proper divisors (995114212).

1285485788 is a wasteful number, since it uses less digits than its factorization.

1285485788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4589 (or 4587 counting only the distinct ones).

The product of its digits is 5734400, while the sum is 56.

The square root of 1285485788 is about 35853.6718900589. The cubic root of 1285485788 is about 1087.3159526121.

The spelling of 1285485788 in words is "one billion, two hundred eighty-five million, four hundred eighty-five thousand, seven hundred eighty-eight".