40020352 has 32 divisors (see below), whose sum is σ = 80839080. Its totient is φ = 19731456.

The previous prime is 40020317. The next prime is 40020371. The reversal of 40020352 is 25302004.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7203 + ... + 11485.

Almost surely, 2^40020352 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 40020352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40419540).

40020352 is an abundant number, since it is smaller than the sum of its proper divisors (40818728).

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

40020352 is an equidigital number, since it uses as much as digits as its factorization.

40020352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4370 (or 4358 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 40020352 is about 6326.1640826017. The cubic root of 40020352 is about 342.0531818850.

Adding to 40020352 its reverse (25302004), we get a palindrome (65322356).

The spelling of 40020352 in words is "forty million, twenty thousand, three hundred fifty-two".