28347790 has 32 divisors (see below), whose sum is σ = 53136000. Its totient is φ = 10875648.

The previous prime is 28347779. The next prime is 28347811. The reversal of 28347790 is 9774382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69106 + ... + 69514.

It is an arithmetic number, because the mean of its divisors is an integer number (1660500).

Almost surely, 2^28347790 is an apocalyptic number.

28347790 is a deficient number, since it is larger than the sum of its proper divisors (24788210).

28347790 is a wasteful number, since it uses less digits than its factorization.

28347790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 28347790 is about 5324.2642684224. The cubic root of 28347790 is about 304.9109836077.

The spelling of 28347790 in words is "twenty-eight million, three hundred forty-seven thousand, seven hundred ninety".