1394994688 has 20 divisors (see below), whose sum is σ = 2787265800. Its totient is φ = 697497088.

The previous prime is 1394994673. The next prime is 1394994737. The reversal of 1394994688 is 8864994931.

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 as a sum of consecutive naturals, namely, 1361788 + ... + 1362811.

It is an arithmetic number, because the mean of its divisors is an integer number (139363290).

Almost surely, 2^1394994688 is an apocalyptic number.

It is an amenable number.

1394994688 is a deficient number, since it is larger than the sum of its proper divisors (1392271112).

1394994688 is an frugal number, since it uses more digits than its factorization.

1394994688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724617 (or 2724601 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 61.

The square root of 1394994688 is about 37349.6276822139. The cubic root of 1394994688 is about 1117.3541626788.

The spelling of 1394994688 in words is "one billion, three hundred ninety-four million, nine hundred ninety-four thousand, six hundred eighty-eight".