1371949940 has 12 divisors (see below), whose sum is σ = 2881094916. Its totient is φ = 548779968.

The previous prime is 1371949937. The next prime is 1371949949. The reversal of 1371949940 is 499491731.

It can be written as a sum of positive squares in 2 ways, for example, as 138956944 + 1232992996 = 11788^2 + 35114^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371949949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34298729 + ... + 34298768.

It is an arithmetic number, because the mean of its divisors is an integer number (240091243).

Almost surely, 2^1371949940 is an apocalyptic number.

1371949940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1371949940 is an abundant number, since it is smaller than the sum of its proper divisors (1509144976).

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

1371949940 is a wasteful number, since it uses less digits than its factorization.

1371949940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68597506 (or 68597504 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1371949940 is about 37039.8426022574. The cubic root of 1371949940 is about 1111.1672217071.

The spelling of 1371949940 in words is "one billion, three hundred seventy-one million, nine hundred forty-nine thousand, nine hundred forty".