4991658 has 32 divisors (see below), whose sum is σ = 11497344. Its totient is φ = 1415232.

The previous prime is 4991653. The next prime is 4991663. The reversal of 4991658 is 8561994.

It is an interprime number because it is at equal distance from previous prime (4991653) and next prime (4991663).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (4991653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6216 + ... + 6972.

It is an arithmetic number, because the mean of its divisors is an integer number (359292).

Almost surely, 2^4991658 is an apocalyptic number.

4991658 is an abundant number, since it is smaller than the sum of its proper divisors (6505686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4991658 is a wasteful number, since it uses less digits than its factorization.

4991658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926.

The product of its digits is 77760, while the sum is 42.

The square root of 4991658 is about 2234.2018709150. The cubic root of 4991658 is about 170.9024442694.

The spelling of 4991658 in words is "four million, nine hundred ninety-one thousand, six hundred fifty-eight".