40732230 has 144 divisors (see below), whose sum is σ = 125541360. Its totient is φ = 8426880.

The previous prime is 40732217. The next prime is 40732253. The reversal of 40732230 is 3223704.

It is a happy number.

It is a super-2 number, since 2×40732230² = 3318229121545800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 40732197 and 40732206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 177756 + ... + 177984.

It is an arithmetic number, because the mean of its divisors is an integer number (871815).

Almost surely, 2^40732230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40732230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62770680).

40732230 is an abundant number, since it is smaller than the sum of its proper divisors (84809130).

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

40732230 is a wasteful number, since it uses less digits than its factorization.

40732230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 40732230 is about 6382.1806618114. The cubic root of 40732230 is about 344.0694097817.

Adding to 40732230 its reverse (3223704), we get a palindrome (43955934).

The spelling of 40732230 in words is "forty million, seven hundred thirty-two thousand, two hundred thirty".