4978641 has 4 divisors (see below), whose sum is σ = 6638192. Its totient is φ = 3319092.

The previous prime is 4978607. The next prime is 4978651. The reversal of 4978641 is 1468794.

It is a happy number.

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.

It is not a de Polignac number, because 4978641 - 2⁶ = 4978577 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4978641.

It is not an unprimeable number, because it can be changed into a prime (4978651) 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, 829771 + ... + 829776.

It is an arithmetic number, because the mean of its divisors is an integer number (1659548).

Almost surely, 2^4978641 is an apocalyptic number.

It is an amenable number.

4978641 is a deficient number, since it is larger than the sum of its proper divisors (1659551).

4978641 is a wasteful number, since it uses less digits than its factorization.

4978641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659550.

The product of its digits is 48384, while the sum is 39.

The square root of 4978641 is about 2231.2868484352. The cubic root of 4978641 is about 170.7537579552.

The spelling of 4978641 in words is "four million, nine hundred seventy-eight thousand, six hundred forty-one".