204693880 has 16 divisors (see below), whose sum is σ = 460561320. Its totient is φ = 81877536.

The previous prime is 204693829. The next prime is 204693887. The reversal of 204693880 is 88396402.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5117347 = 204693880 / (2 + 0 + 4 + 6 + 9 + 3 + 8 + 8 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204693887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558634 + ... + 2558713.

Almost surely, 2^204693880 is an apocalyptic number.

204693880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204693880 is an abundant number, since it is smaller than the sum of its proper divisors (255867440).

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

204693880 is a wasteful number, since it uses less digits than its factorization.

204693880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117358 (or 5117354 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 204693880 is about 14307.1268953623. The cubic root of 204693880 is about 589.3432124472.

The spelling of 204693880 in words is "two hundred four million, six hundred ninety-three thousand, eight hundred eighty".