1398667671 has 24 divisors (see below), whose sum is σ = 2032233840. Its totient is φ = 926956800.

The previous prime is 1398667667. The next prime is 1398667681. The reversal of 1398667671 is 1767668931.

It is a happy number.

It is not a de Polignac number, because 1398667671 - 2² = 1398667667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398667601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1587151 + ... + 1588031.

It is an arithmetic number, because the mean of its divisors is an integer number (84676410).

Almost surely, 2^1398667671 is an apocalyptic number.

1398667671 is a deficient number, since it is larger than the sum of its proper divisors (633566169).

1398667671 is a wasteful number, since it uses less digits than its factorization.

1398667671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1724 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1398667671 is about 37398.7656347105. The cubic root of 1398667671 is about 1118.3339576110. Note that the first 3 decimals are identical.

The spelling of 1398667671 in words is "one billion, three hundred ninety-eight million, six hundred sixty-seven thousand, six hundred seventy-one".