40686030 has 256 divisors, whose sum is σ = 143769600. Its totient is φ = 7931520.

The previous prime is 40686013. The next prime is 40686031. The reversal of 40686030 is 3068604.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40685985 and 40686003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40686031) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 394959 + ... + 395061.

It is an arithmetic number, because the mean of its divisors is an integer number (561600).

Almost surely, 2^40686030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40686030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71884800).

40686030 is an abundant number, since it is smaller than the sum of its proper divisors (103083570).

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

40686030 is a wasteful number, since it uses less digits than its factorization.

40686030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40686030 is about 6378.5601823609. The cubic root of 40686030 is about 343.9392751564.

It can be divided in two parts, 406 and 86030, that added together give a square (86436 = 294²).

The spelling of 40686030 in words is "forty million, six hundred eighty-six thousand, thirty".