205437830 has 32 divisors (see below), whose sum is σ = 401133600. Its totient is φ = 75301632.

The previous prime is 205437821. The next prime is 205437847. The reversal of 205437830 is 38734502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12386 + ... + 23754.

It is an arithmetic number, because the mean of its divisors is an integer number (12535425).

Almost surely, 2^205437830 is an apocalyptic number.

205437830 is a deficient number, since it is larger than the sum of its proper divisors (195695770).

205437830 is a wasteful number, since it uses less digits than its factorization.

205437830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 205437830 is about 14333.1025950420. The cubic root of 205437830 is about 590.0563290086.

The spelling of 205437830 in words is "two hundred five million, four hundred thirty-seven thousand, eight hundred thirty".