205278972 has 36 divisors (see below), whose sum is σ = 485301096. Its totient is φ = 67535520.

The previous prime is 205278949. The next prime is 205278973. The reversal of 205278972 is 279872502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205278973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73522 + ... + 76262.

It is an arithmetic number, because the mean of its divisors is an integer number (13480586).

Almost surely, 2^205278972 is an apocalyptic number.

It is an amenable number.

205278972 is an abundant number, since it is smaller than the sum of its proper divisors (280022124).

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

205278972 is a wasteful number, since it uses less digits than its factorization.

205278972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 205278972 is about 14327.5598759873. The cubic root of 205278972 is about 589.9041997092.

The spelling of 205278972 in words is "two hundred five million, two hundred seventy-eight thousand, nine hundred seventy-two".