40020630 has 64 divisors (see below), whose sum is σ = 104690880. Its totient is φ = 9732096.

The previous prime is 40020611. The next prime is 40020637. The reversal of 40020630 is 3602004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34134 + ... + 35286.

It is an arithmetic number, because the mean of its divisors is an integer number (1635795).

Almost surely, 2^40020630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40020630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52345440).

40020630 is an abundant number, since it is smaller than the sum of its proper divisors (64670250).

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

40020630 is a wasteful number, since it uses less digits than its factorization.

40020630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40020630 is about 6326.1860548043. The cubic root of 40020630 is about 342.0539739034.

Adding to 40020630 its reverse (3602004), we get a palindrome (43622634).

The spelling of 40020630 in words is "forty million, twenty thousand, six hundred thirty".