206628440 has 16 divisors (see below), whose sum is σ = 464914080. Its totient is φ = 82651360.

The previous prime is 206628379. The next prime is 206628467. The reversal of 206628440 is 44826602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 206628397 and 206628406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2582816 + ... + 2582895.

It is an arithmetic number, because the mean of its divisors is an integer number (29057130).

Almost surely, 2^206628440 is an apocalyptic number.

206628440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206628440 is an abundant number, since it is smaller than the sum of its proper divisors (258285640).

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

206628440 is a wasteful number, since it uses less digits than its factorization.

206628440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165722 (or 5165718 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 206628440 is about 14374.5761676649. The cubic root of 206628440 is about 591.1940197630.

The spelling of 206628440 in words is "two hundred six million, six hundred twenty-eight thousand, four hundred forty".