28101493 has 24 divisors (see below), whose sum is σ = 35366400. Its totient is φ = 21842688.

The previous prime is 28101487. The next prime is 28101499. The reversal of 28101493 is 39410182.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28101487) and next prime (28101499).

It is not a de Polignac number, because 28101493 - 2¹⁷ = 27970421 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 (28101499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58428 + ... + 58906.

It is an arithmetic number, because the mean of its divisors is an integer number (1473600).

Almost surely, 2^28101493 is an apocalyptic number.

28101493 is the 3353-rd heptagonal number.

It is an amenable number.

28101493 is a deficient number, since it is larger than the sum of its proper divisors (7264907).

28101493 is a wasteful number, since it uses less digits than its factorization.

28101493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28101493 is about 5301.0841344012. The cubic root of 28101493 is about 304.0253506387.

The spelling of 28101493 in words is "twenty-eight million, one hundred one thousand, four hundred ninety-three".