409261272 has 128 divisors (see below), whose sum is σ = 1206965760. Its totient is φ = 113218560.

The previous prime is 409261199. The next prime is 409261277. The reversal of 409261272 is 272162904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409261277) 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 31 ways as a sum of consecutive naturals, for example, 1307388 + ... + 1307700.

It is an arithmetic number, because the mean of its divisors is an integer number (9429420).

Almost surely, 2^409261272 is an apocalyptic number.

409261272 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 409261272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (603482880).

409261272 is an abundant number, since it is smaller than the sum of its proper divisors (797704488).

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

409261272 is a wasteful number, since it uses less digits than its factorization.

409261272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 409261272 is about 20230.2069193570. The cubic root of 409261272 is about 742.4494386775.

The spelling of 409261272 in words is "four hundred nine million, two hundred sixty-one thousand, two hundred seventy-two".