28213702 has 16 divisors (see below), whose sum is σ = 47040912. Its totient is φ = 12581920.

The previous prime is 28213687. The next prime is 28213733. The reversal of 28213702 is 20731282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10933 + ... + 13264.

It is an arithmetic number, because the mean of its divisors is an integer number (2940057).

Almost surely, 2^28213702 is an apocalyptic number.

28213702 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28213702 is a deficient number, since it is larger than the sum of its proper divisors (18827210).

28213702 is a wasteful number, since it uses less digits than its factorization.

28213702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24263.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28213702 is about 5311.6571802028. The cubic root of 28213702 is about 304.4294700319.

Adding to 28213702 its reverse (20731282), we get a palindrome (48944984).

The spelling of 28213702 in words is "twenty-eight million, two hundred thirteen thousand, seven hundred two".