40398630 has 64 divisors (see below), whose sum is σ = 103716288. Its totient is φ = 10035200.

The previous prime is 40398583. The next prime is 40398643. The reversal of 40398630 is 3689304.

40398630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40398591 and 40398600.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 57280 + ... + 57980.

It is an arithmetic number, because the mean of its divisors is an integer number (1620567).

Almost surely, 2^40398630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40398630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51858144).

40398630 is an abundant number, since it is smaller than the sum of its proper divisors (63317658).

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

40398630 is a wasteful number, since it uses less digits than its factorization.

40398630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

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

The square root of 40398630 is about 6355.9916614168. The cubic root of 40398630 is about 343.1275156501.

The spelling of 40398630 in words is "forty million, three hundred ninety-eight thousand, six hundred thirty".