206711428 has 24 divisors (see below), whose sum is σ = 451007424. Its totient is φ = 80536800.

The previous prime is 206711413. The next prime is 206711429. The reversal of 206711428 is 824117602.

It is a super-2 number, since 2×206711428² = 85459228931598368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 206711428.

It is not an unprimeable number, because it can be changed into a prime (206711429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335263 + ... + 335878.

It is an arithmetic number, because the mean of its divisors is an integer number (18791976).

Almost surely, 2^206711428 is an apocalyptic number.

206711428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206711428 is an abundant number, since it is smaller than the sum of its proper divisors (244295996).

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

206711428 is a wasteful number, since it uses less digits than its factorization.

206711428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671163 (or 671161 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 206711428 is about 14377.4625021246. The cubic root of 206711428 is about 591.2731560821.

The spelling of 206711428 in words is "two hundred six million, seven hundred eleven thousand, four hundred twenty-eight".