28291465 has 8 divisors (see below), whose sum is σ = 34086528. Its totient is φ = 22542000.

The previous prime is 28291457. The next prime is 28291481. The reversal of 28291465 is 56419282.

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

It is not a de Polignac number, because 28291465 - 2³ = 28291457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10017 + ... + 12526.

It is an arithmetic number, because the mean of its divisors is an integer number (4260816).

Almost surely, 2^28291465 is an apocalyptic number.

It is an amenable number.

28291465 is a deficient number, since it is larger than the sum of its proper divisors (5795063).

28291465 is a wasteful number, since it uses less digits than its factorization.

28291465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22799.

The product of its digits is 34560, while the sum is 37.

The square root of 28291465 is about 5318.9721751481. The cubic root of 28291465 is about 304.7089043828.

The spelling of 28291465 in words is "twenty-eight million, two hundred ninety-one thousand, four hundred sixty-five".