1285975480 has 64 divisors (see below), whose sum is σ = 3144038400. Its totient is φ = 471588480.

The previous prime is 1285975469. The next prime is 1285975529. The reversal of 1285975480 is 845795821.

It is a happy number.

It is a super-2 number, since 2×1285975480² = 3307465870322460800, 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 15 ways as a sum of consecutive naturals, for example, 3732 + ... + 50851.

It is an arithmetic number, because the mean of its divisors is an integer number (49125600).

Almost surely, 2^1285975480 is an apocalyptic number.

1285975480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285975480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572019200).

1285975480 is an abundant number, since it is smaller than the sum of its proper divisors (1858062920).

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

1285975480 is a wasteful number, since it uses less digits than its factorization.

1285975480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54644 (or 54640 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 49.

The square root of 1285975480 is about 35860.5002753726. The cubic root of 1285975480 is about 1087.4540021942.

The spelling of 1285975480 in words is "one billion, two hundred eighty-five million, nine hundred seventy-five thousand, four hundred eighty".