40215432 has 64 divisors (see below), whose sum is σ = 104693760. Its totient is φ = 12859200.

The previous prime is 40215397. The next prime is 40215433. The reversal of 40215432 is 23451204.

It is a junction number, because it is equal to n+sod(n) for n = 40215399 and 40215408.

It is not an unprimeable number, because it can be changed into a prime (40215433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141963 + ... + 142245.

It is an arithmetic number, because the mean of its divisors is an integer number (1635840).

Almost surely, 2^40215432 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 40215432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52346880).

40215432 is an abundant number, since it is smaller than the sum of its proper divisors (64478328).

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

40215432 is a wasteful number, since it uses less digits than its factorization.

40215432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40215432 is about 6341.5638449833. The cubic root of 40215432 is about 342.6080629407.

Adding to 40215432 its reverse (23451204), we get a palindrome (63666636).

It can be divided in two parts, 4021 and 5432, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 40215432 in words is "forty million, two hundred fifteen thousand, four hundred thirty-two".