40948813 has 4 divisors (see below), whose sum is σ = 40984668. Its totient is φ = 40912960.

The previous prime is 40948769. The next prime is 40948823. The reversal of 40948813 is 31884904.

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 19954089 + 20994724 = 4467^2 + 4582^2 .

It is a cyclic number.

It is not a de Polignac number, because 40948813 - 2¹⁷ = 40817741 is a prime.

It is a super-2 number, since 2×40948813² = 3353610572217938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40948823) 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, 16156 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (10246167).

Almost surely, 2^40948813 is an apocalyptic number.

It is an amenable number.

40948813 is a deficient number, since it is larger than the sum of its proper divisors (35855).

40948813 is a wasteful number, since it uses less digits than its factorization.

40948813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35854.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 40948813 is about 6399.1259559412. The cubic root of 40948813 is about 344.6781651767.

The spelling of 40948813 in words is "forty million, nine hundred forty-eight thousand, eight hundred thirteen".