40399851 has 8 divisors (see below), whose sum is σ = 55604224. Its totient is φ = 26064360.

The previous prime is 40399841. The next prime is 40399901. The reversal of 40399851 is 15899304.

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

It is not a de Polignac number, because 40399851 - 2⁶ = 40399787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40399811) 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, 217111 + ... + 217296.

It is an arithmetic number, because the mean of its divisors is an integer number (6950528).

Almost surely, 2^40399851 is an apocalyptic number.

40399851 is a deficient number, since it is larger than the sum of its proper divisors (15204373).

40399851 is a wasteful number, since it uses less digits than its factorization.

40399851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434441.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 40399851 is about 6356.0877117925. The cubic root of 40399851 is about 343.1309724874.

The spelling of 40399851 in words is "forty million, three hundred ninety-nine thousand, eight hundred fifty-one".