93640240 has 80 divisors (see below), whose sum is σ = 225485568. Its totient is φ = 36142848.

The previous prime is 93640223. The next prime is 93640247. The reversal of 93640240 is 4204639.

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

It is a junction number, because it is equal to n+sod(n) for n = 93640199 and 93640208.

It is not an unprimeable number, because it can be changed into a prime (93640247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560637 + ... + 560803.

Almost surely, 2^93640240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 93640240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112742784).

93640240 is an abundant number, since it is smaller than the sum of its proper divisors (131845328).

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

93640240 is a wasteful number, since it uses less digits than its factorization.

93640240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 93640240 is about 9676.7887235384. The cubic root of 93640240 is about 454.1027926145.

Adding to 93640240 its reverse (4204639), we get a palindrome (97844879).

The spelling of 93640240 in words is "ninety-three million, six hundred forty thousand, two hundred forty".