40138851 has 8 divisors (see below), whose sum is σ = 53650960. Its totient is φ = 26692992.

The previous prime is 40138837. The next prime is 40138867. The reversal of 40138851 is 15883104.

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

It is not a de Polignac number, because 40138851 - 2⁹ = 40138339 is a prime.

It is a super-2 number, since 2×40138851² = 3222254719200402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40138801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15130 + ... + 17583.

It is an arithmetic number, because the mean of its divisors is an integer number (6706370).

Almost surely, 2^40138851 is an apocalyptic number.

40138851 is a deficient number, since it is larger than the sum of its proper divisors (13512109).

40138851 is a wasteful number, since it uses less digits than its factorization.

40138851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33125.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 40138851 is about 6335.5229460558. The cubic root of 40138851 is about 342.3904521159.

The spelling of 40138851 in words is "forty million, one hundred thirty-eight thousand, eight hundred fifty-one".