205720460 has 24 divisors (see below), whose sum is σ = 471287376. Its totient is φ = 74807360.

The previous prime is 205720423. The next prime is 205720469. The reversal of 205720460 is 64027502.

It is a super-2 number, since 2×205720460² = 84641815325223200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205720469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467327 + ... + 467766.

It is an arithmetic number, because the mean of its divisors is an integer number (19636974).

Almost surely, 2^205720460 is an apocalyptic number.

205720460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205720460 is an abundant number, since it is smaller than the sum of its proper divisors (265566916).

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

205720460 is a wasteful number, since it uses less digits than its factorization.

205720460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935113 (or 935111 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 205720460 is about 14342.9585511498. The cubic root of 205720460 is about 590.3267939665.

Adding to 205720460 its reverse (64027502), we get a palindrome (269747962).

The spelling of 205720460 in words is "two hundred five million, seven hundred twenty thousand, four hundred sixty".