40828969 has 4 divisors (see below), whose sum is σ = 40976644. Its totient is φ = 40681296.

The previous prime is 40828961. The next prime is 40828981. The reversal of 40828969 is 96982804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 23088025 = 4212^2 + 4805^2 .

It is a cyclic number.

It is not a de Polignac number, because 40828969 - 2³ = 40828961 is a prime.

It is a super-2 number, since 2×40828969² = 3334009419205922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40828961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73422 + ... + 73975.

It is an arithmetic number, because the mean of its divisors is an integer number (10244161).

Almost surely, 2^40828969 is an apocalyptic number.

It is an amenable number.

40828969 is a deficient number, since it is larger than the sum of its proper divisors (147675).

40828969 is a wasteful number, since it uses less digits than its factorization.

40828969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147674.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 40828969 is about 6389.7550031281. The cubic root of 40828969 is about 344.3415825778.

The spelling of 40828969 in words is "forty million, eight hundred twenty-eight thousand, nine hundred sixty-nine".