40464981 has 32 divisors (see below), whose sum is σ = 66251520. Its totient is φ = 24279552.

The previous prime is 40464971. The next prime is 40464989. The reversal of 40464981 is 18946404.

It is a happy number.

40464981 is a `hidden beast` number, since 4 + 0 + 4 + 649 + 8 + 1 = 666.

40464981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40464981 - 2¹⁰ = 40463957 is a prime.

It is a super-2 number, since 2×40464981² = 3274829374660722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40464989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8641 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (2070360).

Almost surely, 2^40464981 is an apocalyptic number.

It is an amenable number.

40464981 is a deficient number, since it is larger than the sum of its proper divisors (25786539).

40464981 is a wasteful number, since it uses less digits than its factorization.

40464981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882 (or 3876 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 40464981 is about 6361.2090831854. The cubic root of 40464981 is about 343.3152645993.

The spelling of 40464981 in words is "forty million, four hundred sixty-four thousand, nine hundred eighty-one".