409438428 has 24 divisors (see below), whose sum is σ = 1091836032. Its totient is φ = 116982384.

The previous prime is 409438397. The next prime is 409438439. The reversal of 409438428 is 824834904.

It is a super-2 number, since 2×409438428² = 335279652646222368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 409438428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2437050 + ... + 2437217.

It is an arithmetic number, because the mean of its divisors is an integer number (45493168).

Almost surely, 2^409438428 is an apocalyptic number.

It is an amenable number.

409438428 is an abundant number, since it is smaller than the sum of its proper divisors (682397604).

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

409438428 is a wasteful number, since it uses less digits than its factorization.

409438428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874281 (or 4874279 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 409438428 is about 20234.5849475595. The cubic root of 409438428 is about 742.5565506929.

The spelling of 409438428 in words is "four hundred nine million, four hundred thirty-eight thousand, four hundred twenty-eight".