40842438 has 128 divisors (see below), whose sum is σ = 110100480. Its totient is φ = 9797760.

The previous prime is 40842433. The next prime is 40842479. The reversal of 40842438 is 83424804.

It is a junction number, because it is equal to n+sod(n) for n = 40842399 and 40842408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40842433) 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, 321531 + ... + 321657.

It is an arithmetic number, because the mean of its divisors is an integer number (860160).

Almost surely, 2^40842438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40842438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55050240).

40842438 is an abundant number, since it is smaller than the sum of its proper divisors (69258042).

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

40842438 is a wasteful number, since it uses less digits than its factorization.

40842438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202.

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 40842438 is about 6390.8088689930. The cubic root of 40842438 is about 344.3794431702.

The spelling of 40842438 in words is "forty million, eight hundred forty-two thousand, four hundred thirty-eight".