1438475868 has 24 divisors (see below), whose sum is σ = 3729382160. Its totient is φ = 479491920.

The previous prime is 1438475849. The next prime is 1438475869. The reversal of 1438475868 is 8685748341.

1438475868 is a `hidden beast` number, since 14 + 3 + 8 + 47 + 586 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438475869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6659503 + ... + 6659718.

Almost surely, 2^1438475868 is an apocalyptic number.

1438475868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1438475868 is an abundant number, since it is smaller than the sum of its proper divisors (2290906292).

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

1438475868 is a wasteful number, since it uses less digits than its factorization.

1438475868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13319234 (or 13319226 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 1438475868 is about 37927.2444029355. The cubic root of 1438475868 is about 1128.8446875899.

The spelling of 1438475868 in words is "one billion, four hundred thirty-eight million, four hundred seventy-five thousand, eight hundred sixty-eight".