40158684 has 18 divisors (see below), whose sum is σ = 101512320. Its totient is φ = 13386216.

The previous prime is 40158659. The next prime is 40158691. The reversal of 40158684 is 48685104.

40158684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×40158684² = 3225439801223712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1115519 = 40158684 / (4 + 0 + 1 + 5 + 8 + 6 + 8 + 4).

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 5 ways as a sum of consecutive naturals, for example, 557724 + ... + 557795.

Almost surely, 2^40158684 is an apocalyptic number.

It is an amenable number.

40158684 is an abundant number, since it is smaller than the sum of its proper divisors (61353636).

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

40158684 is a wasteful number, since it uses less digits than its factorization.

40158684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115529 (or 1115524 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 40158684 is about 6337.0879747720. The cubic root of 40158684 is about 342.4468356573.

The spelling of 40158684 in words is "forty million, one hundred fifty-eight thousand, six hundred eighty-four".