409620994 has 8 divisors (see below), whose sum is σ = 626024700. Its totient is φ = 200946096.

The previous prime is 409620983. The next prime is 409620997. The reversal of 409620994 is 499026904.

It can be written as a sum of positive squares in 2 ways, for example, as 387577969 + 22043025 = 19687^2 + 4695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 409620994.

It is not an unprimeable number, because it can be changed into a prime (409620997) 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, 1932069 + ... + 1932280.

Almost surely, 2^409620994 is an apocalyptic number.

409620994 is a deficient number, since it is larger than the sum of its proper divisors (216403706).

409620994 is a wasteful number, since it uses less digits than its factorization.

409620994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3864404.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 409620994 is about 20239.0956813787. The cubic root of 409620994 is about 742.6669013795. Note that the first 3 decimals are identical.

The spelling of 409620994 in words is "four hundred nine million, six hundred twenty thousand, nine hundred ninety-four".