1438985386 has 16 divisors (see below), whose sum is σ = 2258233344. Its totient is φ = 686405104.

The previous prime is 1438985377. The next prime is 1438985447. The reversal of 1438985386 is 6835898341.

It is a super-2 number, since 2×1438985386² = 4141357882243137992, which contains 22 as substring.

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, 23221 + ... + 58456.

It is an arithmetic number, because the mean of its divisors is an integer number (141139584).

Almost surely, 2^1438985386 is an apocalyptic number.

1438985386 is a deficient number, since it is larger than the sum of its proper divisors (819247958).

1438985386 is a wasteful number, since it uses less digits than its factorization.

1438985386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82085.

The product of its digits is 4976640, while the sum is 55.

The square root of 1438985386 is about 37933.9608530404. The cubic root of 1438985386 is about 1128.9779533620.

The spelling of 1438985386 in words is "one billion, four hundred thirty-eight million, nine hundred eighty-five thousand, three hundred eighty-six".