409945248 has 144 divisors (see below), whose sum is σ = 1203654816. Its totient is φ = 132288000.

The previous prime is 409945241. The next prime is 409945279. The reversal of 409945248 is 842549904.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409945241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1633123 + ... + 1633373.

It is an arithmetic number, because the mean of its divisors is an integer number (8358714).

Almost surely, 2^409945248 is an apocalyptic number.

409945248 is a gapful number since it is divisible by the number (48) 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 409945248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601827408).

409945248 is an abundant number, since it is smaller than the sum of its proper divisors (793709568).

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

409945248 is a wasteful number, since it uses less digits than its factorization.

409945248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 409945248 is about 20247.1046819045. The cubic root of 409945248 is about 742.8628135380.

The spelling of 409945248 in words is "four hundred nine million, nine hundred forty-five thousand, two hundred forty-eight".