28157469 has 8 divisors (see below), whose sum is σ = 38251872. Its totient is φ = 18417360.

The previous prime is 28157461. The next prime is 28157477. The reversal of 28157469 is 96475182.

It is an interprime number because it is at equal distance from previous prime (28157461) and next prime (28157477).

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

It is not a de Polignac number, because 28157469 - 2³ = 28157461 is a prime.

It is a super-2 number, since 2×28157469² = 1585686120971922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28157469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28157461) 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, 88387 + ... + 88704.

It is an arithmetic number, because the mean of its divisors is an integer number (4781484).

Almost surely, 2^28157469 is an apocalyptic number.

It is an amenable number.

28157469 is a deficient number, since it is larger than the sum of its proper divisors (10094403).

28157469 is a wasteful number, since it uses less digits than its factorization.

28157469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177147.

The product of its digits is 120960, while the sum is 42.

The square root of 28157469 is about 5306.3611825808. The cubic root of 28157469 is about 304.2270817463.

The spelling of 28157469 in words is "twenty-eight million, one hundred fifty-seven thousand, four hundred sixty-nine".