1438388976 has 20 divisors (see below), whose sum is σ = 3715838312. Its totient is φ = 479462976.

The previous prime is 1438388971. The next prime is 1438388983. The reversal of 1438388976 is 6798838341.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438388971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14983171 + ... + 14983266.

Almost surely, 2^1438388976 is an apocalyptic number.

1438388976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1438388976 is an abundant number, since it is smaller than the sum of its proper divisors (2277449336).

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

1438388976 is a wasteful number, since it uses less digits than its factorization.

1438388976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29966448 (or 29966442 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The square root of 1438388976 is about 37926.0988766311. The cubic root of 1438388976 is about 1128.8219576181.

The spelling of 1438388976 in words is "one billion, four hundred thirty-eight million, three hundred eighty-eight thousand, nine hundred seventy-six".