1378476746 has 4 divisors (see below), whose sum is σ = 2067715122. Its totient is φ = 689238372.

The previous prime is 1378476731. The next prime is 1378476763. The reversal of 1378476746 is 6476748731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 755425225 + 623051521 = 27485^2 + 24961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344619185 + ... + 344619188.

Almost surely, 2^1378476746 is an apocalyptic number.

1378476746 is a deficient number, since it is larger than the sum of its proper divisors (689238376).

1378476746 is an equidigital number, since it uses as much as digits as its factorization.

1378476746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689238375.

The product of its digits is 4741632, while the sum is 53.

The square root of 1378476746 is about 37127.8432715934. The cubic root of 1378476746 is about 1112.9264944903.

The spelling of 1378476746 in words is "one billion, three hundred seventy-eight million, four hundred seventy-six thousand, seven hundred forty-six".