1288870464 has 224 divisors, whose sum is σ = 4031488000. Its totient is φ = 355829760.

The previous prime is 1288870447. The next prime is 1288870493. The reversal of 1288870464 is 4640788821.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×1288870464² = 3322374145943150592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6476637 + ... + 6476835.

Almost surely, 2^1288870464 is an apocalyptic number.

1288870464 is a gapful number since it is divisible by the number (14) 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 1288870464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2015744000).

1288870464 is an abundant number, since it is smaller than the sum of its proper divisors (2742617536).

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

1288870464 is a wasteful number, since it uses less digits than its factorization.

1288870464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 48.

The square root of 1288870464 is about 35900.8421071150. The cubic root of 1288870464 is about 1088.2694149706.

The spelling of 1288870464 in words is "one billion, two hundred eighty-eight million, eight hundred seventy thousand, four hundred sixty-four".