1438636492 has 12 divisors (see below), whose sum is σ = 2665708920. Its totient is φ = 677005376.

The previous prime is 1438636483. The next prime is 1438636519. The reversal of 1438636492 is 2946368341.

It is a super-2 number, since 2×1438636492² = 4139349912228132128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10578142 + ... + 10578277.

It is an arithmetic number, because the mean of its divisors is an integer number (222142410).

Almost surely, 2^1438636492 is an apocalyptic number.

It is an amenable number.

1438636492 is a deficient number, since it is larger than the sum of its proper divisors (1227072428).

1438636492 is a wasteful number, since it uses less digits than its factorization.

1438636492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21156440 (or 21156438 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 1438636492 is about 37929.3618717742. The cubic root of 1438636492 is about 1128.8867026153.

The spelling of 1438636492 in words is "one billion, four hundred thirty-eight million, six hundred thirty-six thousand, four hundred ninety-two".