40123472 has 40 divisors (see below), whose sum is σ = 82331040. Its totient is φ = 18910080.

The previous prime is 40123471. The next prime is 40123487. The reversal of 40123472 is 27432104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123471) 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, 18947 + ... + 20957.

It is an arithmetic number, because the mean of its divisors is an integer number (2058276).

Almost surely, 2^40123472 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 40123472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41165520).

40123472 is an abundant number, since it is smaller than the sum of its proper divisors (42207568).

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

40123472 is a wasteful number, since it uses less digits than its factorization.

40123472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40123472 is about 6334.3091178123. The cubic root of 40123472 is about 342.3467181335.

Adding to 40123472 its reverse (27432104), we get a palindrome (67555576).

The spelling of 40123472 in words is "forty million, one hundred twenty-three thousand, four hundred seventy-two".