280148641 has 4 divisors (see below), whose sum is σ = 284330032. Its totient is φ = 275967252.

The previous prime is 280148633. The next prime is 280148647. The reversal of 280148641 is 146841082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280148641 - 2³ = 280148633 is a prime.

It is a super-2 number, since 2×280148641² = 156966522108293762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280148597 and 280148606.

It is not an unprimeable number, because it can be changed into a prime (280148647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090595 + ... + 2090728.

It is an arithmetic number, because the mean of its divisors is an integer number (71082508).

Almost surely, 2^280148641 is an apocalyptic number.

It is an amenable number.

280148641 is a deficient number, since it is larger than the sum of its proper divisors (4181391).

280148641 is an equidigital number, since it uses as much as digits as its factorization.

280148641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181390.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 280148641 is about 16737.6414407765. The cubic root of 280148641 is about 654.3290069319.

The spelling of 280148641 in words is "two hundred eighty million, one hundred forty-eight thousand, six hundred forty-one".