281468649 has 64 divisors (see below), whose sum is σ = 485388288. Its totient is φ = 140851200.

The previous prime is 281468617. The next prime is 281468653. The reversal of 281468649 is 946864182.

It is not a de Polignac number, because 281468649 - 2⁵ = 281468617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281468598 and 281468607.

It is not an unprimeable number, because it can be changed into a prime (281468249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1070092 + ... + 1070354.

It is an arithmetic number, because the mean of its divisors is an integer number (7584192).

Almost surely, 2^281468649 is an apocalyptic number.

It is an amenable number.

281468649 is a deficient number, since it is larger than the sum of its proper divisors (203919639).

281468649 is a wasteful number, since it uses less digits than its factorization.

281468649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438.

The product of its digits is 663552, while the sum is 48.

The square root of 281468649 is about 16777.0274184672. The cubic root of 281468649 is about 655.3550890134.

The spelling of 281468649 in words is "two hundred eighty-one million, four hundred sixty-eight thousand, six hundred forty-nine".