1377749870 has 32 divisors (see below), whose sum is σ = 3000950208. Its totient is φ = 444584448.

The previous prime is 1377749861. The next prime is 1377749903. The reversal of 1377749870 is 789477731.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 577697 + ... + 580076.

It is an arithmetic number, because the mean of its divisors is an integer number (93779694).

Almost surely, 2^1377749870 is an apocalyptic number.

1377749870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1377749870 is an abundant number, since it is smaller than the sum of its proper divisors (1623200338).

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

1377749870 is a wasteful number, since it uses less digits than its factorization.

1377749870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157804.

The product of its (nonzero) digits is 2074464, while the sum is 53.

The square root of 1377749870 is about 37118.0531547655. The cubic root of 1377749870 is about 1112.7308433142.

The spelling of 1377749870 in words is "one billion, three hundred seventy-seven million, seven hundred forty-nine thousand, eight hundred seventy".