28471797 has 16 divisors (see below), whose sum is σ = 42408960. Its totient is φ = 18878400.

The previous prime is 28471789. The next prime is 28471829. The reversal of 28471797 is 79717482.

It is a happy number.

It is not a de Polignac number, because 28471797 - 2³ = 28471789 is a prime.

It is a super-3 number, since 3×28471797³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28471727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2397 + ... + 7917.

It is an arithmetic number, because the mean of its divisors is an integer number (2650560).

Almost surely, 2^28471797 is an apocalyptic number.

28471797 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28471797 is a deficient number, since it is larger than the sum of its proper divisors (13937163).

28471797 is a wasteful number, since it uses less digits than its factorization.

28471797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721 (or 5715 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 28471797 is about 5335.8970192462. The cubic root of 28471797 is about 305.3549464381.

The spelling of 28471797 in words is "twenty-eight million, four hundred seventy-one thousand, seven hundred ninety-seven".