28739590 has 32 divisors (see below), whose sum is σ = 59408640. Its totient is φ = 9900000.

The previous prime is 28739587. The next prime is 28739591. The reversal of 28739590 is 9593782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739591) 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, 4786 + ... + 8965.

It is an arithmetic number, because the mean of its divisors is an integer number (1856520).

Almost surely, 2^28739590 is an apocalyptic number.

28739590 is an abundant number, since it is smaller than the sum of its proper divisors (30669050).

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

28739590 is a wasteful number, since it uses less digits than its factorization.

28739590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13788.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 28739590 is about 5360.9318219877. The cubic root of 28739590 is about 306.3093046333.

The spelling of 28739590 in words is "twenty-eight million, seven hundred thirty-nine thousand, five hundred ninety".