40489890 has 128 divisors (see below), whose sum is σ = 118444032. Its totient is φ = 8659200.

The previous prime is 40489859. The next prime is 40489957. The reversal of 40489890 is 9898404.

40489890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 400840 + ... + 400940.

It is an arithmetic number, because the mean of its divisors is an integer number (925344).

Almost surely, 2^40489890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40489890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59222016).

40489890 is an abundant number, since it is smaller than the sum of its proper divisors (77954142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40489890 is a wasteful number, since it uses less digits than its factorization.

40489890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 40489890 is about 6363.1666644840. The cubic root of 40489890 is about 343.3856949287.

The spelling of 40489890 in words is "forty million, four hundred eighty-nine thousand, eight hundred ninety".