40689330 has 64 divisors (see below), whose sum is σ = 112814208. Its totient is φ = 9282560.

The previous prime is 40689293. The next prime is 40689353. The reversal of 40689330 is 3398604.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 40689291 and 40689300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1984 + ... + 9236.

It is an arithmetic number, because the mean of its divisors is an integer number (1762722).

Almost surely, 2^40689330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40689330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56407104).

40689330 is an abundant number, since it is smaller than the sum of its proper divisors (72124878).

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

40689330 is a wasteful number, since it uses less digits than its factorization.

40689330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7291.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40689330 is about 6378.8188561833. The cubic root of 40689330 is about 343.9485737528.

The spelling of 40689330 in words is "forty million, six hundred eighty-nine thousand, three hundred thirty".