40147440 has 60 divisors (see below), whose sum is σ = 124762104. Its totient is φ = 10679808.

The previous prime is 40147433. The next prime is 40147441. The reversal of 40147440 is 4474104.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×40147440² = 3223633877107200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 40147440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40147441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97956 + ... + 98364.

Almost surely, 2^40147440 is an apocalyptic number.

40147440 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 40147440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62381052).

40147440 is an abundant number, since it is smaller than the sum of its proper divisors (84614664).

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

40147440 is an equidigital number, since it uses as much as digits as its factorization.

40147440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 40147440 is about 6336.2007543953. The cubic root of 40147440 is about 342.4148721959.

The spelling of 40147440 in words is "forty million, one hundred forty-seven thousand, four hundred forty".