206630400 has 120 divisors (see below), whose sum is σ = 682717464. Its totient is φ = 55091200.

The previous prime is 206630399. The next prime is 206630419. The reversal of 206630400 is 4036602.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×206630400² = 85392244408320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35710 + ... + 41090.

Almost surely, 2^206630400 is an apocalyptic number.

206630400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206630400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341358732).

206630400 is an abundant number, since it is smaller than the sum of its proper divisors (476087064).

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

206630400 is an equidigital number, since it uses as much as digits as its factorization.

206630400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412 (or 5391 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 206630400 is about 14374.6443434264. The cubic root of 206630400 is about 591.1958890387.

The spelling of 206630400 in words is "two hundred six million, six hundred thirty thousand, four hundred".