1463309978 has 8 divisors (see below), whose sum is σ = 2363808468. Its totient is φ = 675373824.

The previous prime is 1463309977. The next prime is 1463309983. The reversal of 1463309978 is 8799033641.

It can be written as a sum of positive squares in 2 ways, for example, as 1457941489 + 5368489 = 38183^2 + 2317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1463309971) 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, 28140551 + ... + 28140602.

Almost surely, 2^1463309978 is an apocalyptic number.

1463309978 is a deficient number, since it is larger than the sum of its proper divisors (900498490).

1463309978 is a wasteful number, since it uses less digits than its factorization.

1463309978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56281168.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 1463309978 is about 38253.2348697466. The cubic root of 1463309978 is about 1135.3038518380.

The spelling of 1463309978 in words is "one billion, four hundred sixty-three million, three hundred nine thousand, nine hundred seventy-eight".