40009152 has 56 divisors (see below), whose sum is σ = 106509312. Its totient is φ = 13254400.

The previous prime is 40009147. The next prime is 40009159. The reversal of 40009152 is 25190004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009159) 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, 36127 + ... + 37217.

It is an arithmetic number, because the mean of its divisors is an integer number (1901952).

Almost surely, 2^40009152 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 40009152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53254656).

40009152 is an abundant number, since it is smaller than the sum of its proper divisors (66500160).

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

40009152 is a wasteful number, since it uses less digits than its factorization.

40009152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 40009152 is about 6325.2788080843. The cubic root of 40009152 is about 342.0212701794.

Adding to 40009152 its reverse (25190004), we get a palindrome (65199156).

The spelling of 40009152 in words is "forty million, nine thousand, one hundred fifty-two".