1277934540 has 48 divisors (see below), whose sum is σ = 3788703072. Its totient is φ = 320736256.

The previous prime is 1277934481. The next prime is 1277934577. The reversal of 1277934540 is 454397721.

It is a junction number, because it is equal to n+sod(n) for n = 1277934492 and 1277934501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625419 + ... + 627458.

It is an arithmetic number, because the mean of its divisors is an integer number (78931314).

Almost surely, 2^1277934540 is an apocalyptic number.

1277934540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1277934540 is an abundant number, since it is smaller than the sum of its proper divisors (2510768532).

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

1277934540 is a wasteful number, since it uses less digits than its factorization.

1277934540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252906 (or 1252904 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 1277934540 is about 35748.2103048530. The cubic root of 1277934540 is about 1085.1827196220.

The spelling of 1277934540 in words is "one billion, two hundred seventy-seven million, nine hundred thirty-four thousand, five hundred forty".