40828281 has 16 divisors (see below), whose sum is σ = 59336256. Its totient is φ = 24820416.

The previous prime is 40828267. The next prime is 40828297. The reversal of 40828281 is 18282804.

It is not a de Polignac number, because 40828281 - 2⁶ = 40828217 is a prime.

It is a super-2 number, since 2×40828281² = 3333897058829922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40828261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3070 + ... + 9543.

It is an arithmetic number, because the mean of its divisors is an integer number (3708516).

Almost surely, 2^40828281 is an apocalyptic number.

It is an amenable number.

40828281 is a deficient number, since it is larger than the sum of its proper divisors (18507975).

40828281 is a wasteful number, since it uses less digits than its factorization.

40828281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12712.

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 40828281 is about 6389.7011667213. The cubic root of 40828281 is about 344.3396484254.

The spelling of 40828281 in words is "forty million, eight hundred twenty-eight thousand, two hundred eighty-one".