1276606464 has 96 divisors (see below), whose sum is σ = 3889791360. Its totient is φ = 364732416.

The previous prime is 1276606453. The next prime is 1276606519. The reversal of 1276606464 is 4646066721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 28167 + ... + 57849.

It is an arithmetic number, because the mean of its divisors is an integer number (40518660).

Almost surely, 2^1276606464 is an apocalyptic number.

1276606464 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 1276606464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944895680).

1276606464 is an abundant number, since it is smaller than the sum of its proper divisors (2613184896).

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

1276606464 is an equidigital number, since it uses as much as digits as its factorization.

1276606464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29715 (or 29695 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 1276606464 is about 35729.6300568590. The cubic root of 1276606464 is about 1084.8066688881.

The spelling of 1276606464 in words is "one billion, two hundred seventy-six million, six hundred six thousand, four hundred sixty-four".