206620740 has 48 divisors (see below), whose sum is σ = 642821760. Its totient is φ = 55098720.

The previous prime is 206620717. The next prime is 206620741. The reversal of 206620740 is 47026602.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (206620741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190776 + ... + 191855.

It is an arithmetic number, because the mean of its divisors is an integer number (13392120).

Almost surely, 2^206620740 is an apocalyptic number.

206620740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206620740 is an abundant number, since it is smaller than the sum of its proper divisors (436201020).

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

206620740 is a wasteful number, since it uses less digits than its factorization.

206620740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382649 (or 382641 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 206620740 is about 14374.3083311859. The cubic root of 206620740 is about 591.1866760651.

The spelling of 206620740 in words is "two hundred six million, six hundred twenty thousand, seven hundred forty".