206157240 has 48 divisors (see below), whose sum is σ = 670012200. Its totient is φ = 54975168.

The previous prime is 206157167. The next prime is 206157253. The reversal of 206157240 is 42751602.

206157240 is a `hidden beast` number, since 2 + 0 + 615 + 7 + 2 + 40 = 666.

206157240 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285970 + ... + 286689.

Almost surely, 2^206157240 is an apocalyptic number.

206157240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206157240 is an abundant number, since it is smaller than the sum of its proper divisors (463854960).

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

206157240 is a wasteful number, since it uses less digits than its factorization.

206157240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572676 (or 572669 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 206157240 is about 14358.1767644781. The cubic root of 206157240 is about 590.7442871517.

The spelling of 206157240 in words is "two hundred six million, one hundred fifty-seven thousand, two hundred forty".