28735692 has 12 divisors (see below), whose sum is σ = 67049976. Its totient is φ = 9578560.

The previous prime is 28735691. The next prime is 28735709. The reversal of 28735692 is 29653782.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (28735691) 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, 1197309 + ... + 1197332.

It is an arithmetic number, because the mean of its divisors is an integer number (5587498).

Almost surely, 2^28735692 is an apocalyptic number.

It is an amenable number.

28735692 is an abundant number, since it is smaller than the sum of its proper divisors (38314284).

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

28735692 is a wasteful number, since it uses less digits than its factorization.

28735692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394648 (or 2394646 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 28735692 is about 5360.5682534597. The cubic root of 28735692 is about 306.2954555880.

The spelling of 28735692 in words is "twenty-eight million, seven hundred thirty-five thousand, six hundred ninety-two".