1399013478 has 16 divisors (see below), whose sum is σ = 3108918960. Its totient is φ = 466337808.

The previous prime is 1399013431. The next prime is 1399013503. The reversal of 1399013478 is 8743109931.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12953775 + ... + 12953882.

It is an arithmetic number, because the mean of its divisors is an integer number (194307435).

Almost surely, 2^1399013478 is an apocalyptic number.

1399013478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1399013478 is an abundant number, since it is smaller than the sum of its proper divisors (1709905482).

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

1399013478 is a wasteful number, since it uses less digits than its factorization.

1399013478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25907668 (or 25907662 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1399013478 is about 37403.3885898056. The cubic root of 1399013478 is about 1118.4261157535.

The spelling of 1399013478 in words is "one billion, three hundred ninety-nine million, thirteen thousand, four hundred seventy-eight".