40023126 has 128 divisors (see below), whose sum is σ = 107412480. Its totient is φ = 10886400.

The previous prime is 40023119. The next prime is 40023127. The reversal of 40023126 is 62132004.

40023126 = 215² + 216² + ... + 506².

It is a happy number.

It is a super-3 number, since 3×40023126³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 = 40023099 and 40023108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 548226 + ... + 548298.

It is an arithmetic number, because the mean of its divisors is an integer number (839160).

Almost surely, 2^40023126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40023126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53706240).

40023126 is an abundant number, since it is smaller than the sum of its proper divisors (67389354).

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

40023126 is a wasteful number, since it uses less digits than its factorization.

40023126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 40023126 is about 6326.3833269887. The cubic root of 40023126 is about 342.0610848107.

The spelling of 40023126 in words is "forty million, twenty-three thousand, one hundred twenty-six".