40147861 has 16 divisors (see below), whose sum is σ = 45183600. Its totient is φ = 35417088.

The previous prime is 40147831. The next prime is 40147889. The reversal of 40147861 is 16874104.

40147861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1322500 + 38825361 = 1150^2 + 6231^2 .

It is a cyclic number.

It is not a de Polignac number, because 40147861 - 2¹¹ = 40145813 is a prime.

It is a super-2 number, since 2×40147861² = 3223701485750642, 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 (40147831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40605 + ... + 41581.

It is an arithmetic number, because the mean of its divisors is an integer number (2823975).

Almost surely, 2^40147861 is an apocalyptic number.

It is an amenable number.

40147861 is a deficient number, since it is larger than the sum of its proper divisors (5035739).

40147861 is a wasteful number, since it uses less digits than its factorization.

40147861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 40147861 is about 6336.2339761092. The cubic root of 40147861 is about 342.4160690855.

The spelling of 40147861 in words is "forty million, one hundred forty-seven thousand, eight hundred sixty-one".