28762730 has 48 divisors (see below), whose sum is σ = 55552392. Its totient is φ = 10713600.

The previous prime is 28762711. The next prime is 28762733. The reversal of 28762730 is 3726782.

It can be written as a sum of positive squares in 4 ways, for example, as 16491721 + 12271009 = 4061^2 + 3503^2 .

It is not an unprimeable number, because it can be changed into a prime (28762733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393974 + ... + 394046.

Almost surely, 2^28762730 is an apocalyptic number.

28762730 is a deficient number, since it is larger than the sum of its proper divisors (26789662).

28762730 is a wasteful number, since it uses less digits than its factorization.

28762730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28762730 is about 5363.0895946273. The cubic root of 28762730 is about 306.3914920252.

It can be divided in two parts, 28762 and 730, that added together give a palindrome (29492).

The spelling of 28762730 in words is "twenty-eight million, seven hundred sixty-two thousand, seven hundred thirty".