40851487 has 4 divisors (see below), whose sum is σ = 40870480. Its totient is φ = 40832496.

The previous prime is 40851469. The next prime is 40851491. The reversal of 40851487 is 78415804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40851487 - 2⁷ = 40851359 is a prime.

It is a super-2 number, since 2×40851487² = 3337687980222338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40851407) 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, 5787 + ... + 10732.

It is an arithmetic number, because the mean of its divisors is an integer number (10217620).

Almost surely, 2^40851487 is an apocalyptic number.

40851487 is a deficient number, since it is larger than the sum of its proper divisors (18993).

40851487 is a wasteful number, since it uses less digits than its factorization.

40851487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18992.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 40851487 is about 6391.5167996337. The cubic root of 40851487 is about 344.4048747198.

The spelling of 40851487 in words is "forty million, eight hundred fifty-one thousand, four hundred eighty-seven".