1386590157 has 10 divisors (see below), whose sum is σ = 2071326158. Its totient is φ = 924393384.

The previous prime is 1386590143. The next prime is 1386590173. The reversal of 1386590157 is 7510956831.

It is a happy number.

1386590157 is a `hidden beast` number, since 1 + 3 + 8 + 6 + 590 + 1 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1282427721 + 104162436 = 35811^2 + 10206^2 .

It is not a de Polignac number, because 1386590157 - 2⁴ = 1386590141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386590657) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8559118 + ... + 8559279.

Almost surely, 2^1386590157 is an apocalyptic number.

It is an amenable number.

1386590157 is a deficient number, since it is larger than the sum of its proper divisors (684736001).

1386590157 is an equidigital number, since it uses as much as digits as its factorization.

1386590157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17118409 (or 17118400 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 1386590157 is about 37236.9461288114. The cubic root of 1386590157 is about 1115.1057048197.

The spelling of 1386590157 in words is "one billion, three hundred eighty-six million, five hundred ninety thousand, one hundred fifty-seven".