1285953040 has 40 divisors (see below), whose sum is σ = 2995676568. Its totient is φ = 513377280.

The previous prime is 1285953037. The next prime is 1285953107. The reversal of 1285953040 is 403595821.

It can be written as a sum of positive squares in 4 ways, for example, as 300304 + 1285652736 = 548^2 + 35856^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26254 + ... + 57106.

Almost surely, 2^1285953040 is an apocalyptic number.

1285953040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285953040 is an abundant number, since it is smaller than the sum of its proper divisors (1709723528).

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

1285953040 is a wasteful number, since it uses less digits than its factorization.

1285953040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31387 (or 31381 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1285953040 is about 35860.1873949370. The cubic root of 1285953040 is about 1087.4476768766.

The spelling of 1285953040 in words is "one billion, two hundred eighty-five million, nine hundred fifty-three thousand, forty".