409421994 has 32 divisors (see below), whose sum is σ = 862954560. Its totient is φ = 129139200.

The previous prime is 409421993. The next prime is 409422007. The reversal of 409421994 is 499124904.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (409421993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133114 + ... + 136154.

It is an arithmetic number, because the mean of its divisors is an integer number (26967330).

Almost surely, 2^409421994 is an apocalyptic number.

409421994 is an abundant number, since it is smaller than the sum of its proper divisors (453532566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

409421994 is a wasteful number, since it uses less digits than its factorization.

409421994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 409421994 is about 20234.1788565783. The cubic root of 409421994 is about 742.5466156723.

The spelling of 409421994 in words is "four hundred nine million, four hundred twenty-one thousand, nine hundred ninety-four".