40031552 has 56 divisors (see below), whose sum is σ = 87672672. Its totient is φ = 17984000.

The previous prime is 40031533. The next prime is 40031557. The reversal of 40031552 is 25513004.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031557) 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, 70823 + ... + 71385.

Almost surely, 2^40031552 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 40031552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43836336).

40031552 is an abundant number, since it is smaller than the sum of its proper divisors (47641120).

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

40031552 is a wasteful number, since it uses less digits than its factorization.

40031552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40031552 is about 6327.0492332524. The cubic root of 40031552 is about 342.0850876373.

Adding to 40031552 its reverse (25513004), we get a palindrome (65544556).

It can be divided in two parts, 4003 and 1552, that added together give a palindrome (5555).

The spelling of 40031552 in words is "forty million, thirty-one thousand, five hundred fifty-two".