408070381 has 4 divisors (see below), whose sum is σ = 408963772. Its totient is φ = 407176992.

The previous prime is 408070379. The next prime is 408070423. The reversal of 408070381 is 183070804.

It is a happy number.

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 343509156 + 64561225 = 18534^2 + 8035^2 .

It is a cyclic number.

It is not a de Polignac number, because 408070381 - 2¹ = 408070379 is a prime.

It is a super-2 number, since 2×408070381² = 333042871698970322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408070321) 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, 446010 + ... + 446923.

It is an arithmetic number, because the mean of its divisors is an integer number (102240943).

Almost surely, 2^408070381 is an apocalyptic number.

It is an amenable number.

408070381 is a deficient number, since it is larger than the sum of its proper divisors (893391).

408070381 is an equidigital number, since it uses as much as digits as its factorization.

408070381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893390.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 408070381 is about 20200.7519909532. The cubic root of 408070381 is about 741.7285989495.

The spelling of 408070381 in words is "four hundred eight million, seventy thousand, three hundred eighty-one".