406625641 has 8 divisors (see below), whose sum is σ = 410657184. Its totient is φ = 402601920.

The previous prime is 406625633. The next prime is 406625647. The reversal of 406625641 is 146526604.

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 406625641 - 2³ = 406625633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406625597 and 406625606.

It is not an unprimeable number, because it can be changed into a prime (406625647) 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, 203650 + ... + 205636.

It is an arithmetic number, because the mean of its divisors is an integer number (51332148).

Almost surely, 2^406625641 is an apocalyptic number.

It is an amenable number.

406625641 is a deficient number, since it is larger than the sum of its proper divisors (4031543).

406625641 is a wasteful number, since it uses less digits than its factorization.

406625641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 406625641 is about 20164.9607239885. The cubic root of 406625641 is about 740.8522206230.

The spelling of 406625641 in words is "four hundred six million, six hundred twenty-five thousand, six hundred forty-one".