1276100940 has 48 divisors (see below), whose sum is σ = 3580270848. Its totient is φ = 339609024.

The previous prime is 1276100923. The next prime is 1276100989. The reversal of 1276100940 is 490016721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1276100898 and 1276100907.

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 15 ways as a sum of consecutive naturals, for example, 9039 + ... + 51321.

It is an arithmetic number, because the mean of its divisors is an integer number (74588976).

Almost surely, 2^1276100940 is an apocalyptic number.

1276100940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276100940 is an abundant number, since it is smaller than the sum of its proper divisors (2304169908).

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

1276100940 is a wasteful number, since it uses less digits than its factorization.

1276100940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42798 (or 42796 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1276100940 is about 35722.5550597938. Note that the first 3 decimals coincide. The cubic root of 1276100940 is about 1084.6634589472.

The spelling of 1276100940 in words is "one billion, two hundred seventy-six million, one hundred thousand, nine hundred forty".