40509612 has 192 divisors, whose sum is σ = 128325120. Its totient is φ = 10886400.

The previous prime is 40509593. The next prime is 40509641. The reversal of 40509612 is 21690504.

40509612 is a `hidden beast` number, since 40 + 5 + 0 + 9 + 612 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 664062 + ... + 664122.

It is an arithmetic number, because the mean of its divisors is an integer number (668360).

Almost surely, 2^40509612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40509612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64162560).

40509612 is an abundant number, since it is smaller than the sum of its proper divisors (87815508).

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

40509612 is a wasteful number, since it uses less digits than its factorization.

40509612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 40509612 is about 6364.7161759186. The cubic root of 40509612 is about 343.4414385017.

The spelling of 40509612 in words is "forty million, five hundred nine thousand, six hundred twelve".