28681692 has 48 divisors (see below), whose sum is σ = 73452960. Its totient is φ = 8656128.

The previous prime is 28681691. The next prime is 28681693. The reversal of 28681692 is 29618682.

It is an interprime number because it is at equal distance from previous prime (28681691) and next prime (28681693).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6534 + ... + 10002.

It is an arithmetic number, because the mean of its divisors is an integer number (1530270).

Almost surely, 2^28681692 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 28681692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36726480).

28681692 is an abundant number, since it is smaller than the sum of its proper divisors (44771268).

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

28681692 is a wasteful number, since it uses less digits than its factorization.

28681692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542 (or 3540 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 28681692 is about 5355.5291055133. The cubic root of 28681692 is about 306.1034722056.

It can be divided in two parts, 2868 and 1692, that added together give a triangular number (4560 = T₉₅).

The spelling of 28681692 in words is "twenty-eight million, six hundred eighty-one thousand, six hundred ninety-two".