1386221858 has 18 divisors (see below), whose sum is σ = 2419458993. Its totient is φ = 593937120.

The previous prime is 1386221833. The next prime is 1386221873. The reversal of 1386221858 is 8581226831.

It can be written as a sum of positive squares in 2 ways, for example, as 1382129329 + 4092529 = 37177^2 + 2023^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26327.

It is a super-2 number, since 2×1386221858² = 3843222079193944328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 366698 + ... + 370458.

Almost surely, 2^1386221858 is an apocalyptic number.

1386221858 is a deficient number, since it is larger than the sum of its proper divisors (1033237135).

1386221858 is an frugal number, since it uses more digits than its factorization.

1386221858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7538 (or 3770 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 1386221858 is about 37232.0004565965. Note that the first 3 decimals coincide. The cubic root of 1386221858 is about 1115.0069665152.

The spelling of 1386221858 in words is "one billion, three hundred eighty-six million, two hundred twenty-one thousand, eight hundred fifty-eight".