409403442 has 16 divisors (see below), whose sum is σ = 935779392. Its totient is φ = 116972400.

The previous prime is 409403441. The next prime is 409403443. The reversal of 409403442 is 244304904.

It is an interprime number because it is at equal distance from previous prime (409403441) and next prime (409403443).

It is a super-2 number, since 2×409403442² = 335222356642894728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (409403441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873809 + ... + 4873892.

It is an arithmetic number, because the mean of its divisors is an integer number (58486212).

Almost surely, 2^409403442 is an apocalyptic number.

409403442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

409403442 is an abundant number, since it is smaller than the sum of its proper divisors (526375950).

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

409403442 is a wasteful number, since it uses less digits than its factorization.

409403442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747713.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 409403442 is about 20233.7204191419. The cubic root of 409403442 is about 742.5353999152.

The spelling of 409403442 in words is "four hundred nine million, four hundred three thousand, four hundred forty-two".