40042026 has 48 divisors (see below), whose sum is σ = 91937664. Its totient is φ = 13055904.

The previous prime is 40042007. The next prime is 40042027. The reversal of 40042026 is 62024004.

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

It is not an unprimeable number, because it can be changed into a prime (40042027) 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, 21966 + ... + 23718.

It is an arithmetic number, because the mean of its divisors is an integer number (1915368).

Almost surely, 2^40042026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40042026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45968832).

40042026 is an abundant number, since it is smaller than the sum of its proper divisors (51895638).

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

40042026 is a wasteful number, since it uses less digits than its factorization.

40042026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817 (or 1805 counting only the distinct ones).

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

The square root of 40042026 is about 6327.8768951363. The cubic root of 40042026 is about 342.1149198287.

The spelling of 40042026 in words is "forty million, forty-two thousand, twenty-six".