206787402 has 24 divisors (see below), whose sum is σ = 448818084. Its totient is φ = 68809344.

The previous prime is 206787359. The next prime is 206787407. The reversal of 206787402 is 204787602.

It can be written as a sum of positive squares in 2 ways, for example, as 206238321 + 549081 = 14361^2 + 741^2 .

It is a super-2 number, since 2×206787402² = 85522059251819208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206787407) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 988 + ... + 20360.

Almost surely, 2^206787402 is an apocalyptic number.

206787402 is an abundant number, since it is smaller than the sum of its proper divisors (242030682).

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

206787402 is a wasteful number, since it uses less digits than its factorization.

206787402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19974 (or 19971 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 206787402 is about 14380.1043807060. The cubic root of 206787402 is about 591.3455853698.

The spelling of 206787402 in words is "two hundred six million, seven hundred eighty-seven thousand, four hundred two".