40011930 has 144 divisors (see below), whose sum is σ = 124416864. Its totient is φ = 8890560.

The previous prime is 40011889. The next prime is 40011943. The reversal of 40011930 is 3911004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 189525 + ... + 189735.

It is an arithmetic number, because the mean of its divisors is an integer number (864006).

Almost surely, 2^40011930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40011930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62208432).

40011930 is an abundant number, since it is smaller than the sum of its proper divisors (84404934).

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

40011930 is a wasteful number, since it uses less digits than its factorization.

40011930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 40011930 is about 6325.4983993358. The cubic root of 40011930 is about 342.0291859775.

Adding to 40011930 its reverse (3911004), we get a palindrome (43922934).

The spelling of 40011930 in words is "forty million, eleven thousand, nine hundred thirty".