4001540032 has 28 divisors (see below), whose sum is σ = 9074922160. Its totient is φ = 1714945536.

The previous prime is 4001539999. The next prime is 4001540033. The reversal of 4001540032 is 2300451004.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×4001540032² = 32024645255397122048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4001539991 and 4001540009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001540033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4465557 + ... + 4466452.

Almost surely, 2^4001540032 is an apocalyptic number.

It is an amenable number.

4001540032 is an abundant number, since it is smaller than the sum of its proper divisors (5073382128).

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

4001540032 is an equidigital number, since it uses as much as digits as its factorization.

4001540032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932028 (or 8932018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4001540032 is about 63257.7270536968. The cubic root of 4001540032 is about 1587.6047465305.

Adding to 4001540032 its reverse (2300451004), we get a palindrome (6301991036).

The spelling of 4001540032 in words is "four billion, one million, five hundred forty thousand, thirty-two".