1285652380 has 48 divisors (see below), whose sum is σ = 2746469376. Its totient is φ = 505431360.

The previous prime is 1285652377. The next prime is 1285652411. The reversal of 1285652380 is 832565821.

It is a super-3 number, since 3×1285652380³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519907 + ... + 522373.

It is an arithmetic number, because the mean of its divisors is an integer number (57218112).

Almost surely, 2^1285652380 is an apocalyptic number.

1285652380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285652380 is an abundant number, since it is smaller than the sum of its proper divisors (1460816996).

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

1285652380 is a wasteful number, since it uses less digits than its factorization.

1285652380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914 (or 2912 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 1285652380 is about 35855.9950356980. The cubic root of 1285652380 is about 1087.3629206705.

The spelling of 1285652380 in words is "one billion, two hundred eighty-five million, six hundred fifty-two thousand, three hundred eighty".