1284497040 has 40 divisors (see below), whose sum is σ = 3981941568. Its totient is φ = 342532480.

The previous prime is 1284497017. The next prime is 1284497063. The reversal of 1284497040 is 407944821.

It is an interprime number because it is at equal distance from previous prime (1284497017) and next prime (1284497063).

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

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1284497040.

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, 2675796 + ... + 2676275.

Almost surely, 2^1284497040 is an apocalyptic number.

1284497040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1284497040 is an abundant number, since it is smaller than the sum of its proper divisors (2697444528).

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

1284497040 is a wasteful number, since it uses less digits than its factorization.

1284497040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352087 (or 5352081 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1284497040 is about 35839.8805801582. The cubic root of 1284497040 is about 1087.0371067368.

The spelling of 1284497040 in words is "one billion, two hundred eighty-four million, four hundred ninety-seven thousand, forty".