28490757 has 8 divisors (see below), whose sum is σ = 38018400. Its totient is φ = 18978480.

The previous prime is 28490753. The next prime is 28490771. The reversal of 28490757 is 75709482.

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

It is not a de Polignac number, because 28490757 - 2² = 28490753 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490753) 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, 1582 + ... + 7712.

It is an arithmetic number, because the mean of its divisors is an integer number (4752300).

Almost surely, 2^28490757 is an apocalyptic number.

It is an amenable number.

28490757 is a deficient number, since it is larger than the sum of its proper divisors (9527643).

28490757 is a wasteful number, since it uses less digits than its factorization.

28490757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7683.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28490757 is about 5337.6733695497. The cubic root of 28490757 is about 305.4227122712.

The spelling of 28490757 in words is "twenty-eight million, four hundred ninety thousand, seven hundred fifty-seven".