206626440 has 32 divisors (see below), whose sum is σ = 619879680. Its totient is φ = 55100352.

The previous prime is 206626423. The next prime is 206626451. The reversal of 206626440 is 44626602.

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 = 206626398 and 206626407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860824 + ... + 861063.

It is an arithmetic number, because the mean of its divisors is an integer number (19371240).

Almost surely, 2^206626440 is an apocalyptic number.

206626440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206626440 is an abundant number, since it is smaller than the sum of its proper divisors (413253240).

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

206626440 is a wasteful number, since it uses less digits than its factorization.

206626440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721901 (or 1721897 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 206626440 is about 14374.5066002281. The cubic root of 206626440 is about 591.1921123265.

The spelling of 206626440 in words is "two hundred six million, six hundred twenty-six thousand, four hundred forty".