1338026987 has 16 divisors (see below), whose sum is σ = 1539553920. Its totient is φ = 1150070400.

The previous prime is 1338026971. The next prime is 1338027017. The reversal of 1338026987 is 7896208331.

It is a cyclic number.

It is not a de Polignac number, because 1338026987 - 2⁴ = 1338026971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338026687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103187 + ... + 115427.

It is an arithmetic number, because the mean of its divisors is an integer number (96222120).

Almost surely, 2^1338026987 is an apocalyptic number.

1338026987 is a deficient number, since it is larger than the sum of its proper divisors (201526933).

1338026987 is a wasteful number, since it uses less digits than its factorization.

1338026987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1338026987 is about 36579.0512042070. The cubic root of 1338026987 is about 1101.9324123598.

The spelling of 1338026987 in words is "one billion, three hundred thirty-eight million, twenty-six thousand, nine hundred eighty-seven".