28739907 has 16 divisors (see below), whose sum is σ = 48660480. Its totient is φ = 16422696.

The previous prime is 28739891. The next prime is 28739917. The reversal of 28739907 is 70993782.

It is not a de Polignac number, because 28739907 - 2⁴ = 28739891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28739917) 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, 75843 + ... + 76220.

It is an arithmetic number, because the mean of its divisors is an integer number (3041280).

Almost surely, 2^28739907 is an apocalyptic number.

28739907 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28739907 is a deficient number, since it is larger than the sum of its proper divisors (19920573).

28739907 is a wasteful number, since it uses less digits than its factorization.

28739907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152079 (or 152073 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 28739907 is about 5360.9613876617. The cubic root of 28739907 is about 306.3104308347.

It can be divided in two parts, 28739 and 907, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28739907 in words is "twenty-eight million, seven hundred thirty-nine thousand, nine hundred seven".