28904349 has 8 divisors (see below), whose sum is σ = 38705472. Its totient is φ = 19186400.

The previous prime is 28904347. The next prime is 28904371. The reversal of 28904349 is 94340982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28904349 - 2¹ = 28904347 is a prime.

It is a super-2 number, since 2×28904349² = 1670922782227602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28904341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19977 + ... + 21374.

It is an arithmetic number, because the mean of its divisors is an integer number (4838184).

Almost surely, 2^28904349 is an apocalyptic number.

It is an amenable number.

28904349 is a deficient number, since it is larger than the sum of its proper divisors (9801123).

28904349 is a wasteful number, since it uses less digits than its factorization.

28904349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41587.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28904349 is about 5376.2764995859. The cubic root of 28904349 is about 306.8935287045.

The spelling of 28904349 in words is "twenty-eight million, nine hundred four thousand, three hundred forty-nine".