206764140 has 96 divisors (see below), whose sum is σ = 648716544. Its totient is φ = 48764160.

The previous prime is 206764127. The next prime is 206764147. The reversal of 206764140 is 41467602.

206764140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 206764098 and 206764107.

It is not an unprimeable number, because it can be changed into a prime (206764147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20187 + ... + 28653.

It is an arithmetic number, because the mean of its divisors is an integer number (6757464).

Almost surely, 2^206764140 is an apocalyptic number.

206764140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206764140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324358272).

206764140 is an abundant number, since it is smaller than the sum of its proper divisors (441952404).

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

206764140 is a wasteful number, since it uses less digits than its factorization.

206764140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527 (or 8525 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 206764140 is about 14379.2955321184. The cubic root of 206764140 is about 591.3234105875.

The spelling of 206764140 in words is "two hundred six million, seven hundred sixty-four thousand, one hundred forty".