28354007 has 4 divisors (see below), whose sum is σ = 30931656. Its totient is φ = 25776360.

The previous prime is 28353989. The next prime is 28354021. The reversal of 28354007 is 70045382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28354007 - 2⁸ = 28353751 is a prime.

It is a super-5 number, since 5×28354007⁵ (a number of 38 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28354087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288808 + ... + 1288829.

It is an arithmetic number, because the mean of its divisors is an integer number (7732914).

Almost surely, 2^28354007 is an apocalyptic number.

28354007 is a deficient number, since it is larger than the sum of its proper divisors (2577649).

28354007 is a wasteful number, since it uses less digits than its factorization.

28354007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577648.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 28354007 is about 5324.8480729501. The cubic root of 28354007 is about 304.9332721532.

Adding to 28354007 its reverse (70045382), we get a palindrome (98399389).

The spelling of 28354007 in words is "twenty-eight million, three hundred fifty-four thousand, seven".