408400379 has 4 divisors (see below), whose sum is σ = 408832584. Its totient is φ = 407968176.

The previous prime is 408400357. The next prime is 408400381. The reversal of 408400379 is 973004804.

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

It is a cyclic number.

It is not a de Polignac number, because 408400379 - 2¹² = 408396283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408400579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214682 + ... + 216575.

It is an arithmetic number, because the mean of its divisors is an integer number (102208146).

Almost surely, 2^408400379 is an apocalyptic number.

408400379 is a deficient number, since it is larger than the sum of its proper divisors (432205).

408400379 is an equidigital number, since it uses as much as digits as its factorization.

408400379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432204.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 408400379 is about 20208.9183035609. The cubic root of 408400379 is about 741.9284852235.

The spelling of 408400379 in words is "four hundred eight million, four hundred thousand, three hundred seventy-nine".