64090690 has 16 divisors (see below), whose sum is σ = 115476480. Its totient is φ = 25611120.

The previous prime is 64090681. The next prime is 64090699. The reversal of 64090690 is 9609046.

64090690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64090681) and next prime (64090699).

It is a super-2 number, since 2×64090690² = 8215233089352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64090699) by changing a digit.

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, 10285 + ... + 15295.

It is an arithmetic number, because the mean of its divisors is an integer number (7217280).

Almost surely, 2^64090690 is an apocalyptic number.

64090690 is a deficient number, since it is larger than the sum of its proper divisors (51385790).

64090690 is a wasteful number, since it uses less digits than its factorization.

64090690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 64090690 is about 8005.6661184439. Note that the first 3 decimals coincide. The cubic root of 64090690 is about 400.1888483267.

The spelling of 64090690 in words is "sixty-four million, ninety thousand, six hundred ninety".