1399679994 has 16 divisors (see below), whose sum is σ = 2801524032. Its totient is φ = 466199328.

The previous prime is 1399679987. The next prime is 1399679999. The reversal of 1399679994 is 4999769931.

It is not an unprimeable number, because it can be changed into a prime (1399679999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81699 + ... + 97334.

It is an arithmetic number, because the mean of its divisors is an integer number (175095252).

Almost surely, 2^1399679994 is an apocalyptic number.

1399679994 is an abundant number, since it is smaller than the sum of its proper divisors (1401844038).

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

1399679994 is a wasteful number, since it uses less digits than its factorization.

1399679994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180341.

The product of its digits is 29760696, while the sum is 66.

The square root of 1399679994 is about 37412.2973633002. The cubic root of 1399679994 is about 1118.6037005450.

The spelling of 1399679994 in words is "one billion, three hundred ninety-nine million, six hundred seventy-nine thousand, nine hundred ninety-four".