40894481 has 2 divisors, whose sum is σ = 40894482. Its totient is φ = 40894480.

The previous prime is 40894457. The next prime is 40894489. The reversal of 40894481 is 18449804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33166081 + 7728400 = 5759^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 40894481 - 2⁶ = 40894417 is a prime.

It is a super-2 number, since 2×40894481² = 3344717152518722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_2484776 and since 40894481 and 2484776 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40894489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20447240 + 20447241.

It is an arithmetic number, because the mean of its divisors is an integer number (20447241).

Almost surely, 2^40894481 is an apocalyptic number.

It is an amenable number.

40894481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40894481 is an equidigital number, since it uses as much as digits as its factorization.

40894481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 40894481 is about 6394.8792795486. The cubic root of 40894481 is about 344.5256549138.

The spelling of 40894481 in words is "forty million, eight hundred ninety-four thousand, four hundred eighty-one".