40579440 has 160 divisors (see below), whose sum is σ = 144633600. Its totient is φ = 9308160.

The previous prime is 40579423. The next prime is 40579453. The reversal of 40579440 is 4497504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 49756 + ... + 50564.

It is an arithmetic number, because the mean of its divisors is an integer number (903960).

Almost surely, 2^40579440 is an apocalyptic number.

40579440 is a gapful number since it is divisible by the number (40) 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 40579440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72316800).

40579440 is an abundant number, since it is smaller than the sum of its proper divisors (104054160).

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

40579440 is a wasteful number, since it uses less digits than its factorization.

40579440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 849 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 40579440 is about 6370.1993689366. The cubic root of 40579440 is about 343.6386596985.

The spelling of 40579440 in words is "forty million, five hundred seventy-nine thousand, four hundred forty".