1326978031 has 16 divisors (see below), whose sum is σ = 1461081600. Its totient is φ = 1199566368.

The previous prime is 1326977983. The next prime is 1326978043. The reversal of 1326978031 is 1308796231.

It is not a de Polignac number, because 1326978031 - 2⁷ = 1326977903 is a prime.

It is a super-2 number, since 2×1326978031² = 3521741389513273922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326978071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188385 + ... + 195301.

It is an arithmetic number, because the mean of its divisors is an integer number (91317600).

Almost surely, 2^1326978031 is an apocalyptic number.

1326978031 is a deficient number, since it is larger than the sum of its proper divisors (134103569).

1326978031 is a wasteful number, since it uses less digits than its factorization.

1326978031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7398.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1326978031 is about 36427.7096589945. The cubic root of 1326978031 is about 1098.8909016631.

The spelling of 1326978031 in words is "one billion, three hundred twenty-six million, nine hundred seventy-eight thousand, thirty-one".