2891628 has 36 divisors (see below), whose sum is σ = 7469280. Its totient is φ = 942816.

The previous prime is 2891599. The next prime is 2891639. The reversal of 2891628 is 8261982.

2891628 is a `hidden beast` number, since 28 + 9 + 1 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2891592 and 2891601.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 838 + ... + 2546.

It is an arithmetic number, because the mean of its divisors is an integer number (207480).

2^2891628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3734640).

2891628 is an abundant number, since it is smaller than the sum of its proper divisors (4577652).

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

2891628 is a wasteful number, since it uses less digits than its factorization.

2891628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766 (or 1761 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2891628 is about 1700.4787561155. The cubic root of 2891628 is about 142.4669544796.

The spelling of 2891628 in words is "two million, eight hundred ninety-one thousand, six hundred twenty-eight".