1277879040 has 108 divisors (see below), whose sum is σ = 4421368224. Its totient is φ = 340764672.

The previous prime is 1277879033. The next prime is 1277879051. The reversal of 1277879040 is 409787721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 43944 + ... + 66983.

Almost surely, 2^1277879040 is an apocalyptic number.

1277879040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277879040 is an abundant number, since it is smaller than the sum of its proper divisors (3143489184).

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

1277879040 is a wasteful number, since it uses less digits than its factorization.

1277879040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110954 (or 110937 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 1277879040 is about 35747.4340337877. The cubic root of 1277879040 is about 1085.1670097634.

The spelling of 1277879040 in words is "one billion, two hundred seventy-seven million, eight hundred seventy-nine thousand, forty".