40921489 has 16 divisors (see below), whose sum is σ = 47851776. Its totient is φ = 34272000.

The previous prime is 40921483. The next prime is 40921501. The reversal of 40921489 is 98412904.

It is a happy number.

It is not a de Polignac number, because 40921489 - 2²³ = 32532881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40921483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67789 + ... + 68389.

It is an arithmetic number, because the mean of its divisors is an integer number (2990736).

Almost surely, 2^40921489 is an apocalyptic number.

It is an amenable number.

40921489 is a deficient number, since it is larger than the sum of its proper divisors (6930287).

40921489 is a wasteful number, since it uses less digits than its factorization.

40921489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 40921489 is about 6396.9906205965. The cubic root of 40921489 is about 344.6014834118.

The spelling of 40921489 in words is "forty million, nine hundred twenty-one thousand, four hundred eighty-nine".