40144032 has 96 divisors (see below), whose sum is σ = 118540800. Its totient is φ = 13215744.

The previous prime is 40144031. The next prime is 40144037. The reversal of 40144032 is 23044104.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×40144032² = 3223086610434048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40143996 and 40144014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83569 + ... + 84047.

It is an arithmetic number, because the mean of its divisors is an integer number (1234800).

Almost surely, 2^40144032 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 40144032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59270400).

40144032 is an abundant number, since it is smaller than the sum of its proper divisors (78396768).

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

40144032 is a wasteful number, since it uses less digits than its factorization.

40144032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40144032 is about 6335.9318178150. The cubic root of 40144032 is about 342.4051830525.

Adding to 40144032 its reverse (23044104), we get a palindrome (63188136).

The spelling of 40144032 in words is "forty million, one hundred forty-four thousand, thirty-two".