28739502 has 32 divisors (see below), whose sum is σ = 69672960. Its totient is φ = 8708760.

The previous prime is 28739471. The next prime is 28739507. The reversal of 28739502 is 20593782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739507) 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, 23598 + ... + 24785.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^28739502 is an apocalyptic number.

28739502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28739502 is an abundant number, since it is smaller than the sum of its proper divisors (40933458).

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

28739502 is a wasteful number, since it uses less digits than its factorization.

28739502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48405 (or 48399 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 28739502 is about 5360.9236144530. The cubic root of 28739502 is about 306.3089919955.

It can be divided in two parts, 28739 and 502, that added together give a square (29241 = 171²).

The spelling of 28739502 in words is "twenty-eight million, seven hundred thirty-nine thousand, five hundred two".