206971400 has 24 divisors (see below), whose sum is σ = 481208970. Its totient is φ = 82788480.

The previous prime is 206971399. The next prime is 206971421. The reversal of 206971400 is 4179602.

It can be written as a sum of positive squares in 3 ways, for example, as 199430884 + 7540516 = 14122^2 + 2746^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 517229 + ... + 517628.

Almost surely, 2^206971400 is an apocalyptic number.

206971400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206971400 is an abundant number, since it is smaller than the sum of its proper divisors (274237570).

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

206971400 is a wasteful number, since it uses less digits than its factorization.

206971400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034873 (or 1034864 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 206971400 is about 14386.5006168978. The cubic root of 206971400 is about 591.5209251120.

The spelling of 206971400 in words is "two hundred six million, nine hundred seventy-one thousand, four hundred".