28735707 has 48 divisors (see below), whose sum is σ = 52399872. Its totient is φ = 13769280.

The previous prime is 28735691. The next prime is 28735709. The reversal of 28735707 is 70753782.

It is not a de Polignac number, because 28735707 - 2⁴ = 28735691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28735709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20338 + ... + 21704.

It is an arithmetic number, because the mean of its divisors is an integer number (1091664).

Almost surely, 2^28735707 is an apocalyptic number.

28735707 is a deficient number, since it is larger than the sum of its proper divisors (23664165).

28735707 is a wasteful number, since it uses less digits than its factorization.

28735707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408 (or 1401 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 28735707 is about 5360.5696525649. The cubic root of 28735707 is about 306.2955088833.

The spelling of 28735707 in words is "twenty-eight million, seven hundred thirty-five thousand, seven hundred seven".