28251377 has 8 divisors (see below), whose sum is σ = 35222592. Its totient is φ = 22014000.

The previous prime is 28251373. The next prime is 28251389. The reversal of 28251377 is 77315282.

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

It is a cyclic number.

It is not a de Polignac number, because 28251377 - 2² = 28251373 is a prime.

It is a super-2 number, since 2×28251377² = 1596280604792258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28251373) 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, 183374 + ... + 183527.

It is an arithmetic number, because the mean of its divisors is an integer number (4402824).

Almost surely, 2^28251377 is an apocalyptic number.

It is an amenable number.

28251377 is a deficient number, since it is larger than the sum of its proper divisors (6971215).

28251377 is a wasteful number, since it uses less digits than its factorization.

28251377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366919.

The product of its digits is 23520, while the sum is 35.

The square root of 28251377 is about 5315.2024420524. The cubic root of 28251377 is about 304.5649157913.

The spelling of 28251377 in words is "twenty-eight million, two hundred fifty-one thousand, three hundred seventy-seven".