2640157 has 8 divisors (see below), whose sum is σ = 2909984. Its totient is φ = 2379888.

The previous prime is 2640139. The next prime is 2640163. The reversal of 2640157 is 7510462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2640157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (363748).

2^2640157 is an apocalyptic number.

It is an amenable number.

2640157 is a deficient number, since it is larger than the sum of its proper divisors (269827).

2640157 is a wasteful number, since it uses less digits than its factorization.

2640157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2640157 is about 1624.8559936191. The cubic root of 2640157 is about 138.2112042844.

The spelling of 2640157 in words is "two million, six hundred forty thousand, one hundred fifty-seven".