28490737 has 8 divisors (see below), whose sum is σ = 31291200. Its totient is φ = 25725360.

The previous prime is 28490729. The next prime is 28490741. The reversal of 28490737 is 73709482.

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 28490737 - 2³ = 28490729 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28490737.

It is not an unprimeable number, because it can be changed into a prime (28490717) 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, 7053 + ... + 10330.

It is an arithmetic number, because the mean of its divisors is an integer number (3911400).

Almost surely, 2^28490737 is an apocalyptic number.

It is an amenable number.

28490737 is a deficient number, since it is larger than the sum of its proper divisors (2800463).

28490737 is a wasteful number, since it uses less digits than its factorization.

28490737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17543.

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

The square root of 28490737 is about 5337.6714960739. The cubic root of 28490737 is about 305.4226408041.

The spelling of 28490737 in words is "twenty-eight million, four hundred ninety thousand, seven hundred thirty-seven".