1399616478 has 48 divisors (see below), whose sum is σ = 3335282496. Its totient is φ = 421485120.

The previous prime is 1399616453. The next prime is 1399616483. The reversal of 1399616478 is 8746169931.

1399616478 is a `hidden beast` number, since 13 + 9 + 9 + 616 + 4 + 7 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52633 + ... + 74628.

It is an arithmetic number, because the mean of its divisors is an integer number (69485052).

Almost surely, 2^1399616478 is an apocalyptic number.

1399616478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1399616478 is an abundant number, since it is smaller than the sum of its proper divisors (1935666018).

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

1399616478 is a wasteful number, since it uses less digits than its factorization.

1399616478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127329 (or 127326 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 1399616478 is about 37411.4484883972. The cubic root of 1399616478 is about 1118.5867799375.

The spelling of 1399616478 in words is "one billion, three hundred ninety-nine million, six hundred sixteen thousand, four hundred seventy-eight".