206634402 has 80 divisors (see below), whose sum is σ = 507386880. Its totient is φ = 62464608.

The previous prime is 206634397. The next prime is 206634413. The reversal of 206634402 is 204436602.

206634402 is a `hidden beast` number, since 20 + 6 + 634 + 4 + 0 + 2 = 666.

206634402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 123423 + ... + 125085.

It is an arithmetic number, because the mean of its divisors is an integer number (6342336).

Almost surely, 2^206634402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206634402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253693440).

206634402 is an abundant number, since it is smaller than the sum of its proper divisors (300752478).

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

206634402 is a wasteful number, since it uses less digits than its factorization.

206634402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 206634402 is about 14374.7835461964. The cubic root of 206634402 is about 591.1997057580.

The spelling of 206634402 in words is "two hundred six million, six hundred thirty-four thousand, four hundred two".