10387640 has 16 divisors (see below), whose sum is σ = 23372280. Its totient is φ = 4155040.

The previous prime is 10387627. The next prime is 10387649. The reversal of 10387640 is 4678301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10387649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129806 + ... + 129885.

Almost surely, 2^10387640 is an apocalyptic number.

10387640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10387640 is an abundant number, since it is smaller than the sum of its proper divisors (12984640).

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

10387640 is a wasteful number, since it uses less digits than its factorization.

10387640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259702 (or 259698 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 10387640 is about 3222.9861929583. The cubic root of 10387640 is about 218.1920704358.

The spelling of 10387640 in words is "ten million, three hundred eighty-seven thousand, six hundred forty".