5618649 has 8 divisors (see below), whose sum is σ = 7614592. Its totient is φ = 3684240.

The previous prime is 5618633. The next prime is 5618671. The reversal of 5618649 is 9468165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5618649 - 2⁴ = 5618633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5618149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15169 + ... + 15534.

It is an arithmetic number, because the mean of its divisors is an integer number (951824).

Almost surely, 2^5618649 is an apocalyptic number.

It is an amenable number.

5618649 is a deficient number, since it is larger than the sum of its proper divisors (1995943).

5618649 is a wasteful number, since it uses less digits than its factorization.

5618649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30767.

The product of its digits is 51840, while the sum is 39.

The square root of 5618649 is about 2370.3689586223. The cubic root of 5618649 is about 177.7777071904. Note that the first 4 decimals are identical.

The spelling of 5618649 in words is "five million, six hundred eighteen thousand, six hundred forty-nine".