1326695990 has 16 divisors (see below), whose sum is σ = 2390854752. Its totient is φ = 530055744.

The previous prime is 1326695977. The next prime is 1326696017. The reversal of 1326695990 is 995966231.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68834 + ... + 85973.

It is an arithmetic number, because the mean of its divisors is an integer number (149428422).

Almost surely, 2^1326695990 is an apocalyptic number.

1326695990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1326695990 is a deficient number, since it is larger than the sum of its proper divisors (1064158762).

1326695990 is a wasteful number, since it uses less digits than its factorization.

1326695990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155671.

The product of its (nonzero) digits is 787320, while the sum is 50.

The square root of 1326695990 is about 36423.8382107103. The cubic root of 1326695990 is about 1098.8130419844.

The spelling of 1326695990 in words is "one billion, three hundred twenty-six million, six hundred ninety-five thousand, nine hundred ninety".