1347777640 has 64 divisors (see below), whose sum is σ = 3378620160. Its totient is φ = 479665920.

The previous prime is 1347777617. The next prime is 1347777653. The reversal of 1347777640 is 467777431.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 11907 + ... + 53266.

It is an arithmetic number, because the mean of its divisors is an integer number (52790940).

Almost surely, 2^1347777640 is an apocalyptic number.

1347777640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1347777640 is an abundant number, since it is smaller than the sum of its proper divisors (2030842520).

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

1347777640 is a wasteful number, since it uses less digits than its factorization.

1347777640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65242 (or 65238 counting only the distinct ones).

The product of its (nonzero) digits is 691488, while the sum is 46.

The square root of 1347777640 is about 36712.0911962258. The cubic root of 1347777640 is about 1104.6026539663.

The spelling of 1347777640 in words is "one billion, three hundred forty-seven million, seven hundred seventy-seven thousand, six hundred forty".