32481540 has 192 divisors, whose sum is σ = 124561920. Its totient is φ = 6842880.

The previous prime is 32481539. The next prime is 32481541. The reversal of 32481540 is 4518423.

It is an interprime number because it is at equal distance from previous prime (32481539) and next prime (32481541).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (32481541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48810 + ... + 49470.

It is an arithmetic number, because the mean of its divisors is an integer number (648760).

Almost surely, 2^32481540 is an apocalyptic number.

32481540 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 32481540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62280960).

32481540 is an abundant number, since it is smaller than the sum of its proper divisors (92080380).

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

32481540 is a wasteful number, since it uses less digits than its factorization.

32481540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 32481540 is about 5699.2578464218. The cubic root of 32481540 is about 319.0647824590.

Adding to 32481540 its reverse (4518423), we get a palindrome (36999963).

The spelling of 32481540 in words is "thirty-two million, four hundred eighty-one thousand, five hundred forty".