42004026 has 48 divisors (see below), whose sum is σ = 96370560. Its totient is φ = 13194720.

The previous prime is 42004013. The next prime is 42004069. The reversal of 42004026 is 62040024.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28680 + ... + 30108.

It is an arithmetic number, because the mean of its divisors is an integer number (2007720).

Almost surely, 2^42004026 is an apocalyptic number.

42004026 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 42004026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48185280).

42004026 is an abundant number, since it is smaller than the sum of its proper divisors (54366534).

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

42004026 is a wasteful number, since it uses less digits than its factorization.

42004026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531 (or 1528 counting only the distinct ones).

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

The square root of 42004026 is about 6481.0513036081. The cubic root of 42004026 is about 347.6137708665.

The spelling of 42004026 in words is "forty-two million, four thousand, twenty-six".