205940428 has 6 divisors (see below), whose sum is σ = 360395756. Its totient is φ = 102970212.

The previous prime is 205940407. The next prime is 205940447. The reversal of 205940428 is 824049502.

It is a super-2 number, since 2×205940428² = 84822919769646368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205940393 and 205940402.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 25742550 + ... + 25742557.

Almost surely, 2^205940428 is an apocalyptic number.

It is an amenable number.

205940428 is a deficient number, since it is larger than the sum of its proper divisors (154455328).

205940428 is a wasteful number, since it uses less digits than its factorization.

205940428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51485111 (or 51485109 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 205940428 is about 14350.6246553939. The cubic root of 205940428 is about 590.5371226647.

The spelling of 205940428 in words is "two hundred five million, nine hundred forty thousand, four hundred twenty-eight".