406148809 has 8 divisors (see below), whose sum is σ = 443636928. Its totient is φ = 368754960.

The previous prime is 406148791. The next prime is 406148839. The reversal of 406148809 is 908841604.

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 406148809 - 2¹³ = 406140617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406148839) 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, 14397 + ... + 31930.

It is an arithmetic number, because the mean of its divisors is an integer number (55454616).

Almost surely, 2^406148809 is an apocalyptic number.

It is an amenable number.

406148809 is a deficient number, since it is larger than the sum of its proper divisors (37488119).

406148809 is a wasteful number, since it uses less digits than its factorization.

406148809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47135.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 406148809 is about 20153.1339746452. The cubic root of 406148809 is about 740.5625190848.

The spelling of 406148809 in words is "four hundred six million, one hundred forty-eight thousand, eight hundred nine".