40398424 has 32 divisors (see below), whose sum is σ = 83643840. Its totient is φ = 18138400.

The previous prime is 40398401. The next prime is 40398433. The reversal of 40398424 is 42489304.

It is a self number, because there is not a number n which added to its sum of digits gives 40398424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4539 + ... + 10069.

It is an arithmetic number, because the mean of its divisors is an integer number (2613870).

Almost surely, 2^40398424 is an apocalyptic number.

40398424 is a gapful number since it is divisible by the number (44) 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 40398424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41821920).

40398424 is an abundant number, since it is smaller than the sum of its proper divisors (43245416).

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

40398424 is a wasteful number, since it uses less digits than its factorization.

40398424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5631 (or 5627 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 40398424 is about 6355.9754562144. The cubic root of 40398424 is about 343.1269324257.

The spelling of 40398424 in words is "forty million, three hundred ninety-eight thousand, four hundred twenty-four".