40442388 has 96 divisors (see below), whose sum is σ = 115605504. Its totient is φ = 10741248.

The previous prime is 40442377. The next prime is 40442407. The reversal of 40442388 is 88324404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181245 + ... + 181467.

It is an arithmetic number, because the mean of its divisors is an integer number (1204224).

Almost surely, 2^40442388 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 40442388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57802752).

40442388 is an abundant number, since it is smaller than the sum of its proper divisors (75163116).

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

40442388 is a wasteful number, since it uses less digits than its factorization.

40442388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

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

The square root of 40442388 is about 6359.4329935931. The cubic root of 40442388 is about 343.2513577709.

The spelling of 40442388 in words is "forty million, four hundred forty-two thousand, three hundred eighty-eight".