1396501986 has 16 divisors (see below), whose sum is σ = 3046913568. Its totient is φ = 423182400.

The previous prime is 1396501979. The next prime is 1396501991. The reversal of 1396501986 is 6891056931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10579495 + ... + 10579626.

It is an arithmetic number, because the mean of its divisors is an integer number (190432098).

Almost surely, 2^1396501986 is an apocalyptic number.

1396501986 is an abundant number, since it is smaller than the sum of its proper divisors (1650411582).

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

1396501986 is a wasteful number, since it uses less digits than its factorization.

1396501986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21159137.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1396501986 is about 37369.8004543776. The cubic root of 1396501986 is about 1117.7564532115.

Subtracting 1396501986 from its reverse (6891056931), we obtain a palindrome (5494554945).

The spelling of 1396501986 in words is "one billion, three hundred ninety-six million, five hundred one thousand, nine hundred eighty-six".