40338648 has 80 divisors (see below), whose sum is σ = 129140880. Its totient is φ = 11524032.

The previous prime is 40338631. The next prime is 40338667. The reversal of 40338648 is 84683304.

40338648 is a `hidden beast` number, since 4 + 0 + 3 + 3 + 8 + 648 = 666.

It is a super-3 number, since 3×40338648³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 90 + ... + 8982.

It is an arithmetic number, because the mean of its divisors is an integer number (1614261).

Almost surely, 2^40338648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40338648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64570440).

40338648 is an abundant number, since it is smaller than the sum of its proper divisors (88802232).

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

40338648 is a wasteful number, since it uses less digits than its factorization.

40338648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8918 (or 8905 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 40338648 is about 6351.2713687891. The cubic root of 40338648 is about 342.9576116278.

The spelling of 40338648 in words is "forty million, three hundred thirty-eight thousand, six hundred forty-eight".