4998640 has 20 divisors (see below), whose sum is σ = 11622024. Its totient is φ = 1999424.

The previous prime is 4998619. The next prime is 4998641. The reversal of 4998640 is 468994.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 4998593 and 4998602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4998641) 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, 31162 + ... + 31321.

Almost surely, 2^4998640 is an apocalyptic number.

4998640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4998640 is an abundant number, since it is smaller than the sum of its proper divisors (6623384).

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

4998640 is a wasteful number, since it uses less digits than its factorization.

4998640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62496 (or 62490 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 4998640 is about 2235.7638515729. The cubic root of 4998640 is about 170.9820894799.

It can be divided in two parts, 49 and 98640, that added together give a palindrome (98689).

The spelling of 4998640 in words is "four million, nine hundred ninety-eight thousand, six hundred forty".