205878870 has 48 divisors (see below), whose sum is σ = 563462640. Its totient is φ = 52011072.

The previous prime is 205878839. The next prime is 205878899. The reversal of 205878870 is 78878502.

It is a happy number.

205878870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×205878870² = 84772218224953800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58489 + ... + 61908.

It is an arithmetic number, because the mean of its divisors is an integer number (11738805).

Almost surely, 2^205878870 is an apocalyptic number.

205878870 is an abundant number, since it is smaller than the sum of its proper divisors (357583770).

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

205878870 is a wasteful number, since it uses less digits than its factorization.

205878870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120429 (or 120426 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 205878870 is about 14348.4797104083. The cubic root of 205878870 is about 590.4782773193.

The spelling of 205878870 in words is "two hundred five million, eight hundred seventy-eight thousand, eight hundred seventy".