206157028 has 48 divisors (see below), whose sum is σ = 476267904. Its totient is φ = 75594240.

The previous prime is 206157023. The next prime is 206157047. The reversal of 206157028 is 820751602.

It is not an unprimeable number, because it can be changed into a prime (206157023) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14451 + ... + 24922.

It is an arithmetic number, because the mean of its divisors is an integer number (9922248).

Almost surely, 2^206157028 is an apocalyptic number.

206157028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206157028 is an abundant number, since it is smaller than the sum of its proper divisors (270110876).

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

206157028 is a wasteful number, since it uses less digits than its factorization.

206157028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39412 (or 39410 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 206157028 is about 14358.1693819233. The cubic root of 206157028 is about 590.7440846561.

The spelling of 206157028 in words is "two hundred six million, one hundred fifty-seven thousand, twenty-eight".