40409460 has 144 divisors (see below), whose sum is σ = 150923136. Its totient is φ = 8522496.

The previous prime is 40409443. The next prime is 40409497. The reversal of 40409460 is 6490404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15147 + ... + 17613.

Almost surely, 2^40409460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40409460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75461568).

40409460 is an abundant number, since it is smaller than the sum of its proper divisors (110513676).

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

40409460 is a wasteful number, since it uses less digits than its factorization.

40409460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40409460 is about 6356.8435563572. The cubic root of 40409460 is about 343.1581746021.

Adding to 40409460 its reverse (6490404), we get a palindrome (46899864).

The spelling of 40409460 in words is "forty million, four hundred nine thousand, four hundred sixty".