206961240 has 32 divisors (see below), whose sum is σ = 620884080. Its totient is φ = 55189632.

The previous prime is 206961217. The next prime is 206961241. The reversal of 206961240 is 42169602.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 206961198 and 206961207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206961241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862219 + ... + 862458.

Almost surely, 2^206961240 is an apocalyptic number.

206961240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206961240 is an abundant number, since it is smaller than the sum of its proper divisors (413922840).

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

206961240 is a wasteful number, since it uses less digits than its factorization.

206961240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724691 (or 1724687 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 206961240 is about 14386.1475037621. The cubic root of 206961240 is about 591.5112459148.

The spelling of 206961240 in words is "two hundred six million, nine hundred sixty-one thousand, two hundred forty".