2660728 has 16 divisors (see below), whose sum is σ = 5701680. Its totient is φ = 1140288.

The previous prime is 2660719. The next prime is 2660737. The reversal of 2660728 is 8270662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2660719) and next prime (2660737).

It is a self number, because there is not a number n which added to its sum of digits gives 2660728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23701 + ... + 23812.

It is an arithmetic number, because the mean of its divisors is an integer number (356355).

2^2660728 is an apocalyptic number.

2660728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2660728 is an abundant number, since it is smaller than the sum of its proper divisors (3040952).

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

2660728 is a wasteful number, since it uses less digits than its factorization.

2660728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47526 (or 47522 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2660728 is about 1631.1738104813. The cubic root of 2660728 is about 138.5692373217.

The spelling of 2660728 in words is "two million, six hundred sixty thousand, seven hundred twenty-eight".