806866740 has 36 divisors (see below), whose sum is σ = 2447496324. Its totient is φ = 215164416.

The previous prime is 806866693. The next prime is 806866741. The reversal of 806866740 is 47668608.

It is a happy number.

806866740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 298183824 + 508682916 = 17268^2 + 22554^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×806866740² = 1302067872236455200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806866741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2241117 + ... + 2241476.

It is an arithmetic number, because the mean of its divisors is an integer number (67986009).

Almost surely, 2^806866740 is an apocalyptic number.

It is an amenable number.

806866740 is an abundant number, since it is smaller than the sum of its proper divisors (1640629584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806866740 is a wasteful number, since it uses less digits than its factorization.

806866740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482608 (or 4482603 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 806866740 is about 28405.3998387631. The cubic root of 806866740 is about 930.9662520653.

The spelling of 806866740 in words is "eight hundred six million, eight hundred sixty-six thousand, seven hundred forty".