11945690 has 16 divisors (see below), whose sum is σ = 21561120. Its totient is φ = 4765200.

The previous prime is 11945683. The next prime is 11945707. The reversal of 11945690 is 9654911.

It is a super-2 number, since 2×11945690² = 285399019152200, which contains 22 as substring.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 11945690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2765 + ... + 5615.

It is an arithmetic number, because the mean of its divisors is an integer number (1347570).

Almost surely, 2^11945690 is an apocalyptic number.

11945690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11945690 is a deficient number, since it is larger than the sum of its proper divisors (9615430).

11945690 is a wasteful number, since it uses less digits than its factorization.

11945690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 11945690 is about 3456.2537522584. The cubic root of 11945690 is about 228.5969404188.

The spelling of 11945690 in words is "eleven million, nine hundred forty-five thousand, six hundred ninety".