40446813 has 16 divisors (see below), whose sum is σ = 59544576. Its totient is φ = 24216240.

The previous prime is 40446797. The next prime is 40446827. The reversal of 40446813 is 31864404.

It is not a de Polignac number, because 40446813 - 2⁴ = 40446797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40446853) 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, 4645 + ... + 10122.

It is an arithmetic number, because the mean of its divisors is an integer number (3721536).

Almost surely, 2^40446813 is an apocalyptic number.

It is an amenable number.

40446813 is a deficient number, since it is larger than the sum of its proper divisors (19097763).

40446813 is a wasteful number, since it uses less digits than its factorization.

40446813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14864.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 40446813 is about 6359.7808924522. The cubic root of 40446813 is about 343.2638762524.

The spelling of 40446813 in words is "forty million, four hundred forty-six thousand, eight hundred thirteen".