28493407 has 8 divisors (see below), whose sum is σ = 30086000. Its totient is φ = 26910144.

The previous prime is 28493323. The next prime is 28493429. The reversal of 28493407 is 70439482.

It is a happy number.

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 28493407 - 2¹⁹ = 27969119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28493447) 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, 4483 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (3760750).

Almost surely, 2^28493407 is an apocalyptic number.

28493407 is a deficient number, since it is larger than the sum of its proper divisors (1592593).

28493407 is a wasteful number, since it uses less digits than its factorization.

28493407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28493407 is about 5337.9215992744. The cubic root of 28493407 is about 305.4321813667.

It can be divided in two parts, 28493 and 407, that added together give a square (28900 = 170²).

The spelling of 28493407 in words is "twenty-eight million, four hundred ninety-three thousand, four hundred seven".