7478649 has 20 divisors (see below), whose sum is σ = 11275264. Its totient is φ = 4939704.

The previous prime is 7478633. The next prime is 7478651. The reversal of 7478649 is 9468747.

It is not a de Polignac number, because 7478649 - 2⁴ = 7478633 is a prime.

It is a d-powerful number, because it can be written as 7⁵ + 4⁵ + 7⁸ + 8 + 6⁸ + 4⁷ + 9 .

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (7478629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9924 + ... + 10650.

Almost surely, 2^7478649 is an apocalyptic number.

It is an amenable number.

7478649 is a deficient number, since it is larger than the sum of its proper divisors (3796615).

7478649 is a wasteful number, since it uses less digits than its factorization.

7478649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 857 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 7478649 is about 2734.7118678208. The cubic root of 7478649 is about 195.5574580972.

The spelling of 7478649 in words is "seven million, four hundred seventy-eight thousand, six hundred forty-nine".