4978845 has 12 divisors (see below), whose sum is σ = 8630076. Its totient is φ = 2655360.

The previous prime is 4978829. The next prime is 4978847. The reversal of 4978845 is 5488794.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 2965284 = 1419^2 + 1722^2 .

It is not a de Polignac number, because 4978845 - 2⁴ = 4978829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 110641 = 4978845 / (4 + 9 + 7 + 8 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 4978845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55276 + ... + 55365.

It is an arithmetic number, because the mean of its divisors is an integer number (719173).

Almost surely, 2^4978845 is an apocalyptic number.

4978845 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4978845 is a deficient number, since it is larger than the sum of its proper divisors (3651231).

4978845 is a wasteful number, since it uses less digits than its factorization.

4978845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110652 (or 110649 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 4978845 is about 2231.3325614977. The cubic root of 4978845 is about 170.7560901372.

The spelling of 4978845 in words is "four million, nine hundred seventy-eight thousand, eight hundred forty-five".