35728821 has 12 divisors (see below), whose sum is σ = 53852448. Its totient is φ = 22783464.

The previous prime is 35728817. The next prime is 35728831. The reversal of 35728821 is 12882753.

35728821 is a `hidden beast` number, since 3 + 572 + 8 + 82 + 1 = 666.

It is not a de Polignac number, because 35728821 - 2² = 35728817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35728831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86095 + ... + 86508.

It is an arithmetic number, because the mean of its divisors is an integer number (4487704).

Almost surely, 2^35728821 is an apocalyptic number.

It is an amenable number.

35728821 is a deficient number, since it is larger than the sum of its proper divisors (18123627).

35728821 is a wasteful number, since it uses less digits than its factorization.

35728821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172632 (or 172629 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 35728821 is about 5977.3590322148. The cubic root of 35728821 is about 329.3615479505.

The spelling of 35728821 in words is "thirty-five million, seven hundred twenty-eight thousand, eight hundred twenty-one".