1282790440 has 64 divisors (see below), whose sum is σ = 2922716160. Its totient is φ = 506684160.

The previous prime is 1282790423. The next prime is 1282790461. The reversal of 1282790440 is 440972821.

It is a self number, because there is not a number n which added to its sum of digits gives 1282790440.

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, 1179577 + ... + 1180663.

It is an arithmetic number, because the mean of its divisors is an integer number (45667440).

Almost surely, 2^1282790440 is an apocalyptic number.

1282790440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1282790440 is an abundant number, since it is smaller than the sum of its proper divisors (1639925720).

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

1282790440 is a wasteful number, since it uses less digits than its factorization.

1282790440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1438 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1282790440 is about 35816.0639936886. The cubic root of 1282790440 is about 1086.5554760123. Note that the first 3 decimals are identical.

The spelling of 1282790440 in words is "one billion, two hundred eighty-two million, seven hundred ninety thousand, four hundred forty".