32640480 has 144 divisors (see below), whose sum is σ = 117346320. Its totient is φ = 8239104.

The previous prime is 32640451. The next prime is 32640481. The reversal of 32640480 is 8404623.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32640481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26764 + ... + 27956.

It is an arithmetic number, because the mean of its divisors is an integer number (814905).

Almost surely, 2^32640480 is an apocalyptic number.

32640480 is a gapful number since it is divisible by the number (30) 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 32640480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58673160).

32640480 is an abundant number, since it is smaller than the sum of its proper divisors (84705840).

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

32640480 is a wasteful number, since it uses less digits than its factorization.

32640480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 32640480 is about 5713.1847510824. The cubic root of 32640480 is about 319.5843561928.

The spelling of 32640480 in words is "thirty-two million, six hundred forty thousand, four hundred eighty".