206400972 has 12 divisors (see below), whose sum is σ = 481602296. Its totient is φ = 68800320.

The previous prime is 206400913. The next prime is 206400973. The reversal of 206400972 is 279004602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×206400972² = 85202722485089568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206400973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8600029 + ... + 8600052.

Almost surely, 2^206400972 is an apocalyptic number.

It is an amenable number.

206400972 is an abundant number, since it is smaller than the sum of its proper divisors (275201324).

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

206400972 is a wasteful number, since it uses less digits than its factorization.

206400972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17200088 (or 17200086 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 206400972 is about 14366.6618252119. The cubic root of 206400972 is about 590.9770004305.

The spelling of 206400972 in words is "two hundred six million, four hundred thousand, nine hundred seventy-two".