40421472 has 144 divisors (see below), whose sum is σ = 133125552. Its totient is φ = 10644480.

The previous prime is 40421471. The next prime is 40421483. The reversal of 40421472 is 27412404.

It is a super-3 number, since 3×40421472³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60822 + ... + 61482.

It is an arithmetic number, because the mean of its divisors is an integer number (924483).

Almost surely, 2^40421472 is an apocalyptic number.

40421472 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40421472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66562776).

40421472 is an abundant number, since it is smaller than the sum of its proper divisors (92704080).

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

40421472 is a wasteful number, since it uses less digits than its factorization.

40421472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 40421472 is about 6357.7882946824. The cubic root of 40421472 is about 343.1921733046.

Adding to 40421472 its reverse (27412404), we get a palindrome (67833876).

The spelling of 40421472 in words is "forty million, four hundred twenty-one thousand, four hundred seventy-two".