206662428 has 60 divisors (see below), whose sum is σ = 617442672. Its totient is φ = 59045760.

The previous prime is 206662409. The next prime is 206662451. The reversal of 206662428 is 824266602.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 206662392 and 206662401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43293 + ... + 47828.

Almost surely, 2^206662428 is an apocalyptic number.

206662428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206662428 is an abundant number, since it is smaller than the sum of its proper divisors (410780244).

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

206662428 is a wasteful number, since it uses less digits than its factorization.

206662428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91144 (or 91133 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 206662428 is about 14375.7583452143. The cubic root of 206662428 is about 591.2264328563.

The spelling of 206662428 in words is "two hundred six million, six hundred sixty-two thousand, four hundred twenty-eight".