3640237 has 4 divisors (see below), whose sum is σ = 3757696. Its totient is φ = 3522780.

The previous prime is 3640223. The next prime is 3640243. The reversal of 3640237 is 7320463.

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: 7320463 = 23 ⋅318281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640207) 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, 58683 + ... + 58744.

It is an arithmetic number, because the mean of its divisors is an integer number (939424).

Almost surely, 2^3640237 is an apocalyptic number.

It is an amenable number.

3640237 is a deficient number, since it is larger than the sum of its proper divisors (117459).

3640237 is a wasteful number, since it uses less digits than its factorization.

3640237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117458.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 3640237 is about 1907.9405126995. The cubic root of 3640237 is about 153.8307721096.

The spelling of 3640237 in words is "three million, six hundred forty thousand, two hundred thirty-seven".