2998640 has 20 divisors (see below), whose sum is σ = 6972024. Its totient is φ = 1199424.

The previous prime is 2998631. The next prime is 2998649. The reversal of 2998640 is 468992.

2998640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2998631) and next prime (2998649).

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

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2998594 and 2998603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2998649) 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, 18662 + ... + 18821.

2^2998640 is an apocalyptic number.

2998640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2998640 is an abundant number, since it is smaller than the sum of its proper divisors (3973384).

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

2998640 is a wasteful number, since it uses less digits than its factorization.

2998640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37496 (or 37490 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2998640 is about 1731.6581648813. The cubic root of 2998640 is about 144.2031597431.

The spelling of 2998640 in words is "two million, nine hundred ninety-eight thousand, six hundred forty".