28735401 has 16 divisors (see below), whose sum is σ = 38912000. Its totient is φ = 18860688.

The previous prime is 28735397. The next prime is 28735403. The reversal of 28735401 is 10453782.

It is not a de Polignac number, because 28735401 - 2² = 28735397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28735403) 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, 75630 + ... + 76008.

It is an arithmetic number, because the mean of its divisors is an integer number (2432000).

Almost surely, 2^28735401 is an apocalyptic number.

It is an amenable number.

28735401 is a deficient number, since it is larger than the sum of its proper divisors (10176599).

28735401 is a wasteful number, since it uses less digits than its factorization.

28735401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28735401 is about 5360.5411107462. The cubic root of 28735401 is about 306.2944216557.

The spelling of 28735401 in words is "twenty-eight million, seven hundred thirty-five thousand, four hundred one".