42026040 has 320 divisors, whose sum is σ = 172497600. Its totient is φ = 8957952.

The previous prime is 42026021. The next prime is 42026041. The reversal of 42026040 is 4062024.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42026041) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 385506 + ... + 385614.

It is an arithmetic number, because the mean of its divisors is an integer number (539055).

Almost surely, 2^42026040 is an apocalyptic number.

42026040 is a gapful number since it is divisible by the number (40) 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 42026040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86248800).

42026040 is an abundant number, since it is smaller than the sum of its proper divisors (130471560).

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

42026040 is a wasteful number, since it uses less digits than its factorization.

42026040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 143 counting only the distinct ones).

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

The square root of 42026040 is about 6482.7494167213. The cubic root of 42026040 is about 347.6744875313.

Adding to 42026040 its reverse (4062024), we get a palindrome (46088064).

The spelling of 42026040 in words is "forty-two million, twenty-six thousand, forty".