1284376764 has 72 divisors (see below), whose sum is σ = 3437400960. Its totient is φ = 372273440.

The previous prime is 1284376699. The next prime is 1284376811. The reversal of 1284376764 is 4676734821.

It is a happy number.

It is a super-2 number, since 2×1284376764² = 3299247343806223392, which contains 22 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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14167 + ... + 52625.

It is an arithmetic number, because the mean of its divisors is an integer number (47741680).

Almost surely, 2^1284376764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1284376764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718700480).

1284376764 is an abundant number, since it is smaller than the sum of its proper divisors (2153024196).

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

1284376764 is a wasteful number, since it uses less digits than its factorization.

1284376764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38511 (or 38498 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 48.

The square root of 1284376764 is about 35838.2025776963. The cubic root of 1284376764 is about 1087.0031768400.

It can be divided in two parts, 128437 and 6764, that multiplied together give a palindrome (868747868).

The spelling of 1284376764 in words is "one billion, two hundred eighty-four million, three hundred seventy-six thousand, seven hundred sixty-four".