32291040 has 48 divisors (see below), whose sum is σ = 101718288. Its totient is φ = 8610816.

The previous prime is 32290997. The next prime is 32291071. The reversal of 32291040 is 4019223.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×32291040² = 2085422528563200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 32290998 and 32291016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33157 + ... + 34116.

It is an arithmetic number, because the mean of its divisors is an integer number (2119131).

Almost surely, 2^32291040 is an apocalyptic number.

32291040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32291040 is an abundant number, since it is smaller than the sum of its proper divisors (69427248).

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

32291040 is a wasteful number, since it uses less digits than its factorization.

32291040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67291 (or 67283 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 32291040 is about 5682.5205674947. The cubic root of 32291040 is about 318.4398012583.

The spelling of 32291040 in words is "thirty-two million, two hundred ninety-one thousand, forty".