40023872 has 56 divisors (see below), whose sum is σ = 93024960. Its totient is φ = 16727040.

The previous prime is 40023871. The next prime is 40023901. The reversal of 40023872 is 27832004.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17279 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (1661160).

Almost surely, 2^40023872 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 40023872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46512480).

40023872 is an abundant number, since it is smaller than the sum of its proper divisors (53001088).

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

40023872 is a wasteful number, since it uses less digits than its factorization.

40023872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40023872 is about 6326.4422861510. The cubic root of 40023872 is about 342.0632100485.

Adding to 40023872 its reverse (27832004), we get a palindrome (67855876).

The spelling of 40023872 in words is "forty million, twenty-three thousand, eight hundred seventy-two".