1326401288 has 16 divisors (see below), whose sum is σ = 2539918080. Its totient is φ = 649089808.

The previous prime is 1326401273. The next prime is 1326401311. The reversal of 1326401288 is 8821046231.

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, 1763456 + ... + 1764207.

It is an arithmetic number, because the mean of its divisors is an integer number (158744880).

Almost surely, 2^1326401288 is an apocalyptic number.

It is an amenable number.

1326401288 is a deficient number, since it is larger than the sum of its proper divisors (1213516792).

1326401288 is a wasteful number, since it uses less digits than its factorization.

1326401288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527716 (or 3527712 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1326401288 is about 36419.7925309851. The cubic root of 1326401288 is about 1098.7316753454.

The spelling of 1326401288 in words is "one billion, three hundred twenty-six million, four hundred one thousand, two hundred eighty-eight".