1396686387 has 8 divisors (see below), whose sum is σ = 1862441680. Its totient is φ = 931027680.

The previous prime is 1396686349. The next prime is 1396686419. The reversal of 1396686387 is 7836866931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1396686387 - 2⁷ = 1396686259 is a prime.

It is a super-2 number, since 2×1396686387² = 3901465727262227538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396686337) 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, 22437 + ... + 57417.

It is an arithmetic number, because the mean of its divisors is an integer number (232805210).

Almost surely, 2^1396686387 is an apocalyptic number.

1396686387 is a deficient number, since it is larger than the sum of its proper divisors (465755293).

1396686387 is a wasteful number, since it uses less digits than its factorization.

1396686387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48293.

The product of its digits is 7838208, while the sum is 57.

The square root of 1396686387 is about 37372.2676191852. The cubic root of 1396686387 is about 1117.8056490686.

The spelling of 1396686387 in words is "one billion, three hundred ninety-six million, six hundred eighty-six thousand, three hundred eighty-seven".