206422440 has 64 divisors (see below), whose sum is σ = 707736960. Its totient is φ = 47182080.

The previous prime is 206422429. The next prime is 206422457. The reversal of 206422440 is 44224602.

It is a super-2 number, since 2×206422440² = 85220447471107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 206422440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122031 + ... + 123710.

It is an arithmetic number, because the mean of its divisors is an integer number (11058390).

Almost surely, 2^206422440 is an apocalyptic number.

206422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206422440 is an abundant number, since it is smaller than the sum of its proper divisors (501314520).

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

206422440 is a wasteful number, since it uses less digits than its factorization.

206422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245762 (or 245758 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 206422440 is about 14367.4089522085. The cubic root of 206422440 is about 590.9974891170.

The spelling of 206422440 in words is "two hundred six million, four hundred twenty-two thousand, four hundred forty".