2788628 has 6 divisors (see below), whose sum is σ = 4880106. Its totient is φ = 1394312.

The previous prime is 2788627. The next prime is 2788633. The reversal of 2788628 is 8268872.

It can be written as a sum of positive squares in only one way, i.e., 1669264 + 1119364 = 1292^2 + 1058^2 .

It is a super-2 number, since 2×2788628² = 15552892244768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348575 + ... + 348582.

It is an arithmetic number, because the mean of its divisors is an integer number (813351).

2^2788628 is an apocalyptic number.

It is an amenable number.

2788628 is a deficient number, since it is larger than the sum of its proper divisors (2091478).

2788628 is a wasteful number, since it uses less digits than its factorization.

2788628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697161 (or 697159 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 2788628 is about 1669.9185608885. The cubic root of 2788628 is about 140.7549017282.

The spelling of 2788628 in words is "two million, seven hundred eighty-eight thousand, six hundred twenty-eight".