40581642 has 8 divisors (see below), whose sum is σ = 81163296. Its totient is φ = 13527212.

The previous prime is 40581631. The next prime is 40581679. The reversal of 40581642 is 24618504.

It is a sphenic number, since it is the product of 3 distinct primes.

40581642 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3381798 + ... + 3381809.

It is an arithmetic number, because the mean of its divisors is an integer number (10145412).

Almost surely, 2^40581642 is an apocalyptic number.

40581642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40581642 is a wasteful number, since it uses less digits than its factorization.

40581642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763612.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 40581642 is about 6370.3722026268. The cubic root of 40581642 is about 343.6448753144.

The spelling of 40581642 in words is "forty million, five hundred eighty-one thousand, six hundred forty-two".