7828649 has 4 divisors (see below), whose sum is σ = 7995264. Its totient is φ = 7662036.

The previous prime is 7828631. The next prime is 7828657. The reversal of 7828649 is 9468287.

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: 9468287 = 131 ⋅72277.

It is a cyclic number.

It is not a de Polignac number, because 7828649 - 2⁸ = 7828393 is a prime.

It is a super-2 number, since 2×7828649² = 122575490330402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7828699) 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, 83237 + ... + 83330.

It is an arithmetic number, because the mean of its divisors is an integer number (1998816).

Almost surely, 2^7828649 is an apocalyptic number.

It is an amenable number.

7828649 is a deficient number, since it is larger than the sum of its proper divisors (166615).

7828649 is a wasteful number, since it uses less digits than its factorization.

7828649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166614.

The product of its digits is 193536, while the sum is 44.

The square root of 7828649 is about 2797.9723015069. The cubic root of 7828649 is about 198.5617570787.

The spelling of 7828649 in words is "seven million, eight hundred twenty-eight thousand, six hundred forty-nine".