1371949856 has 12 divisors (see below), whose sum is σ = 2701026342. Its totient is φ = 685974912.

The previous prime is 1371949849. The next prime is 1371949867. The reversal of 1371949856 is 6589491731.

It can be written as a sum of positive squares in only one way, i.e., 993258256 + 378691600 = 31516^2 + 19460^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1371949798 and 1371949807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21436685 + ... + 21436748.

Almost surely, 2^1371949856 is an apocalyptic number.

1371949856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1371949856 is a deficient number, since it is larger than the sum of its proper divisors (1329076486).

1371949856 is an equidigital number, since it uses as much as digits as its factorization.

1371949856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42873443 (or 42873435 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 1371949856 is about 37039.8414683432. The cubic root of 1371949856 is about 1111.1671990294.

The spelling of 1371949856 in words is "one billion, three hundred seventy-one million, nine hundred forty-nine thousand, eight hundred fifty-six".