40003552 has 48 divisors (see below), whose sum is σ = 81375840. Its totient is φ = 19348992.

The previous prime is 40003543. The next prime is 40003553. The reversal of 40003552 is 25530004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003553) 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, 174574 + ... + 174802.

It is an arithmetic number, because the mean of its divisors is an integer number (1695330).

Almost surely, 2^40003552 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 40003552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40687920).

40003552 is an abundant number, since it is smaller than the sum of its proper divisors (41372288).

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

40003552 is a wasteful number, since it uses less digits than its factorization.

40003552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 40003552 is about 6324.8361243593. The cubic root of 40003552 is about 342.0053120933.

Adding to 40003552 its reverse (25530004), we get a palindrome (65533556).

The spelling of 40003552 in words is "forty million, three thousand, five hundred fifty-two".