1406220809 has 8 divisors (see below), whose sum is σ = 1634349120. Its totient is φ = 1184902416.

The previous prime is 1406220793. The next prime is 1406220811. The reversal of 1406220809 is 9080226041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1406220809 - 2⁴ = 1406220793 is a prime.

It is a super-2 number, since 2×1406220809² = 3954913927329228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406220859) 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, 1702034 + ... + 1702859.

It is an arithmetic number, because the mean of its divisors is an integer number (204293640).

Almost surely, 2^1406220809 is an apocalyptic number.

It is an amenable number.

1406220809 is a deficient number, since it is larger than the sum of its proper divisors (228128311).

1406220809 is an equidigital number, since it uses as much as digits as its factorization.

1406220809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404959.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1406220809 is about 37499.6107846468. The cubic root of 1406220809 is about 1120.3434344857.

The spelling of 1406220809 in words is "one billion, four hundred six million, two hundred twenty thousand, eight hundred nine".