3640157 has 4 divisors (see below), whose sum is σ = 3664416. Its totient is φ = 3615900.

The previous prime is 3640151. The next prime is 3640163. The reversal of 3640157 is 7510463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7510463 = 31 ⋅242273.

It is an interprime number because it is at equal distance from previous prime (3640151) and next prime (3640163).

It is a cyclic number.

It is not a de Polignac number, because 3640157 - 2¹⁴ = 3623773 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 (3640151) 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, 11903 + ... + 12204.

It is an arithmetic number, because the mean of its divisors is an integer number (916104).

Almost surely, 2^3640157 is an apocalyptic number.

It is an amenable number.

3640157 is a deficient number, since it is larger than the sum of its proper divisors (24259).

3640157 is a wasteful number, since it uses less digits than its factorization.

3640157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24258.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 3640157 is about 1907.9195475701. The cubic root of 3640157 is about 153.8296452094.

The spelling of 3640157 in words is "three million, six hundred forty thousand, one hundred fifty-seven".