40287642 has 8 divisors (see below), whose sum is σ = 80575296. Its totient is φ = 13429212.

The previous prime is 40287629. The next prime is 40287647. The reversal of 40287642 is 24678204.

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

40287642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (40287647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3357298 + ... + 3357309.

It is an arithmetic number, because the mean of its divisors is an integer number (10071912).

Almost surely, 2^40287642 is an apocalyptic number.

40287642 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.

40287642 is a wasteful number, since it uses less digits than its factorization.

40287642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714612.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 40287642 is about 6347.2546821441. The cubic root of 40287642 is about 342.8130003189.

The spelling of 40287642 in words is "forty million, two hundred eighty-seven thousand, six hundred forty-two".