32251440 has 80 divisors (see below), whose sum is σ = 107680608. Its totient is φ = 7938048.

The previous prime is 32251423. The next prime is 32251459. The reversal of 32251440 is 4415223.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2049 + ... + 8288.

Almost surely, 2^32251440 is an apocalyptic number.

32251440 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 32251440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53840304).

32251440 is an abundant number, since it is smaller than the sum of its proper divisors (75429168).

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

32251440 is a wasteful number, since it uses less digits than its factorization.

32251440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10366 (or 10360 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 32251440 is about 5679.0351293155. The cubic root of 32251440 is about 318.3095755107.

Adding to 32251440 its reverse (4415223), we get a palindrome (36666663).

The spelling of 32251440 in words is "thirty-two million, two hundred fifty-one thousand, four hundred forty".