40423432 has 48 divisors (see below), whose sum is σ = 89128620. Its totient is φ = 17136000.

The previous prime is 40423429. The next prime is 40423447. The reversal of 40423432 is 23432404.

It can be written as a sum of positive squares in 2 ways, for example, as 36072036 + 4351396 = 6006^2 + 2086^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39082 + ... + 40102.

Almost surely, 2^40423432 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 40423432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44564310).

40423432 is an abundant number, since it is smaller than the sum of its proper divisors (48705188).

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

40423432 is a wasteful number, since it uses less digits than its factorization.

40423432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 40423432 is about 6357.9424344673. The cubic root of 40423432 is about 343.1977202392.

Adding to 40423432 its reverse (23432404), we get a palindrome (63855836).

The spelling of 40423432 in words is "forty million, four hundred twenty-three thousand, four hundred thirty-two".