1276345400 has 96 divisors (see below), whose sum is σ = 3271196880. Its totient is φ = 459264000.

The previous prime is 1276345381. The next prime is 1276345403. The reversal of 1276345400 is 45436721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276345403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210410 + ... + 216390.

Almost surely, 2^1276345400 is an apocalyptic number.

1276345400 is a gapful number since it is divisible by the number (10) 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 1276345400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1635598440).

1276345400 is an abundant number, since it is smaller than the sum of its proper divisors (1994851480).

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

1276345400 is a wasteful number, since it uses less digits than its factorization.

1276345400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105 (or 6096 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 1276345400 is about 35725.9765436860. The cubic root of 1276345400 is about 1084.7327167649.

The spelling of 1276345400 in words is "one billion, two hundred seventy-six million, three hundred forty-five thousand, four hundred".