206678970 has 24 divisors (see below), whose sum is σ = 537365556. Its totient is φ = 55114368.

The previous prime is 206678957. The next prime is 206678981. The reversal of 206678970 is 79876602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 203319081 + 3359889 = 14259^2 + 1833^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1148127 + ... + 1148306.

Almost surely, 2^206678970 is an apocalyptic number.

206678970 is an abundant number, since it is smaller than the sum of its proper divisors (330686586).

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

206678970 is a wasteful number, since it uses less digits than its factorization.

206678970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296446 (or 2296443 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 206678970 is about 14376.3336772628. Note that the first 3 decimals coincide. The cubic root of 206678970 is about 591.2422070616.

The spelling of 206678970 in words is "two hundred six million, six hundred seventy-eight thousand, nine hundred seventy".