28392441 has 32 divisors (see below), whose sum is σ = 49689600. Its totient is φ = 13970880.

The previous prime is 28392437. The next prime is 28392449. The reversal of 28392441 is 14429382.

It is not a de Polignac number, because 28392441 - 2² = 28392437 is a prime.

It is a super-2 number, since 2×28392441² = 1612261411876962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (28392449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1155 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (1552800).

Almost surely, 2^28392441 is an apocalyptic number.

28392441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28392441 is a deficient number, since it is larger than the sum of its proper divisors (21297159).

28392441 is a wasteful number, since it uses less digits than its factorization.

28392441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6509.

The product of its digits is 13824, while the sum is 33.

The square root of 28392441 is about 5328.4557800549. The cubic root of 28392441 is about 305.0709894777.

The spelling of 28392441 in words is "twenty-eight million, three hundred ninety-two thousand, four hundred forty-one".