3642578 has 4 divisors (see below), whose sum is σ = 5463870. Its totient is φ = 1821288.

The previous prime is 3642577. The next prime is 3642581. The reversal of 3642578 is 8752463.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8752463 = 61 ⋅143483.

It can be written as a sum of positive squares in only one way, i.e., 3636649 + 5929 = 1907^2 + 77^2 .

It is not an unprimeable number, because it can be changed into a prime (3642571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910643 + ... + 910646.

Almost surely, 2^3642578 is an apocalyptic number.

3642578 is a deficient number, since it is larger than the sum of its proper divisors (1821292).

3642578 is a wasteful number, since it uses less digits than its factorization.

3642578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821291.

The product of its digits is 40320, while the sum is 35.

The square root of 3642578 is about 1908.5539028280. The cubic root of 3642578 is about 153.8637407203.

The spelling of 3642578 in words is "three million, six hundred forty-two thousand, five hundred seventy-eight".