28007427 has 8 divisors (see below), whose sum is σ = 42678016. Its totient is φ = 16004232.

The previous prime is 28007423. The next prime is 28007431. The reversal of 28007427 is 72470082.

It is an interprime number because it is at equal distance from previous prime (28007423) and next prime (28007431).

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

It is not a de Polignac number, because 28007427 - 2² = 28007423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28007394 and 28007403.

It is not an unprimeable number, because it can be changed into a prime (28007423) 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, 666823 + ... + 666864.

It is an arithmetic number, because the mean of its divisors is an integer number (5334752).

Almost surely, 2^28007427 is an apocalyptic number.

28007427 is a deficient number, since it is larger than the sum of its proper divisors (14670589).

28007427 is a wasteful number, since it uses less digits than its factorization.

28007427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333697.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 28007427 is about 5292.2043611335. The cubic root of 28007427 is about 303.6857433216.

The spelling of 28007427 in words is "twenty-eight million, seven thousand, four hundred twenty-seven".