406152385 has 4 divisors (see below), whose sum is σ = 487382868. Its totient is φ = 324921904.

The previous prime is 406152371. The next prime is 406152403. The reversal of 406152385 is 583251604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162511504 + 243640881 = 12748^2 + 15609^2 .

It is a cyclic number.

It is not a de Polignac number, because 406152385 - 2²³ = 397763777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406152385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40615234 + ... + 40615243.

It is an arithmetic number, because the mean of its divisors is an integer number (121845717).

Almost surely, 2^406152385 is an apocalyptic number.

It is an amenable number.

406152385 is a deficient number, since it is larger than the sum of its proper divisors (81230483).

406152385 is an equidigital number, since it uses as much as digits as its factorization.

406152385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81230482.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 406152385 is about 20153.2226951423. Note that the first 3 decimals coincide. The cubic root of 406152385 is about 740.5646925441.

The spelling of 406152385 in words is "four hundred six million, one hundred fifty-two thousand, three hundred eighty-five".