28935690 has 64 divisors (see below), whose sum is σ = 79847424. Its totient is φ = 6573888.

The previous prime is 28935661. The next prime is 28935701. The reversal of 28935690 is 9653982.

It is a super-2 number, since 2×28935690² = 1674548311552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47367 + ... + 47973.

It is an arithmetic number, because the mean of its divisors is an integer number (1247616).

Almost surely, 2^28935690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28935690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39923712).

28935690 is an abundant number, since it is smaller than the sum of its proper divisors (50911734).

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

28935690 is a wasteful number, since it uses less digits than its factorization.

28935690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 28935690 is about 5379.1904595394. The cubic root of 28935690 is about 307.0044102398.

The spelling of 28935690 in words is "twenty-eight million, nine hundred thirty-five thousand, six hundred ninety".