1398016636 has 12 divisors (see below), whose sum is σ = 2552900112. Its totient is φ = 668616608.

The previous prime is 1398016577. The next prime is 1398016639. The reversal of 1398016636 is 6366108931.

It is a junction number, because it is equal to n+sod(n) for n = 1398016592 and 1398016601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398016639) 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, 7597825 + ... + 7598008.

It is an arithmetic number, because the mean of its divisors is an integer number (212741676).

Almost surely, 2^1398016636 is an apocalyptic number.

It is an amenable number.

1398016636 is a deficient number, since it is larger than the sum of its proper divisors (1154883476).

1398016636 is a wasteful number, since it uses less digits than its factorization.

1398016636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15195860 (or 15195858 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1398016636 is about 37390.0606578807. The cubic root of 1398016636 is about 1118.1604144700.

The spelling of 1398016636 in words is "one billion, three hundred ninety-eight million, sixteen thousand, six hundred thirty-six".