4991878 has 8 divisors (see below), whose sum is σ = 7507872. Its totient is φ = 2489256.

The previous prime is 4991867. The next prime is 4991879. The reversal of 4991878 is 8781994.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4991879) 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, 2350 + ... + 3937.

It is an arithmetic number, because the mean of its divisors is an integer number (938484).

Almost surely, 2^4991878 is an apocalyptic number.

4991878 is a deficient number, since it is larger than the sum of its proper divisors (2515994).

4991878 is a wasteful number, since it uses less digits than its factorization.

4991878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686.

The product of its digits is 145152, while the sum is 46.

The square root of 4991878 is about 2234.2511049566. The cubic root of 4991878 is about 170.9049549907.

The spelling of 4991878 in words is "four million, nine hundred ninety-one thousand, eight hundred seventy-eight".