32640540 has 24 divisors (see below), whose sum is σ = 91393680. Its totient is φ = 8704128.

The previous prime is 32640529. The next prime is 32640581. The reversal of 32640540 is 4504623.

It is a self number, because there is not a number n which added to its sum of digits gives 32640540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271945 + ... + 272064.

It is an arithmetic number, because the mean of its divisors is an integer number (3808070).

Almost surely, 2^32640540 is an apocalyptic number.

32640540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32640540 is an abundant number, since it is smaller than the sum of its proper divisors (58753140).

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

32640540 is a wasteful number, since it uses less digits than its factorization.

32640540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544021 (or 544019 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 32640540 is about 5713.1900020917. The cubic root of 32640540 is about 319.5845520135.

The spelling of 32640540 in words is "thirty-two million, six hundred forty thousand, five hundred forty".