40154643 has 16 divisors (see below), whose sum is σ = 59620000. Its totient is φ = 26710560.

The previous prime is 40154623. The next prime is 40154651. The reversal of 40154643 is 34645104.

40154643 is a `hidden beast` number, since 4 + 0 + 15 + 4 + 643 = 666.

It is not a de Polignac number, because 40154643 - 2¹³ = 40146451 is a prime.

It is a super-2 number, since 2×40154643² = 3224790708914898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40154623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13233 + ... + 15981.

It is an arithmetic number, because the mean of its divisors is an integer number (3726250).

Almost surely, 2^40154643 is an apocalyptic number.

40154643 is a deficient number, since it is larger than the sum of its proper divisors (19465357).

40154643 is a wasteful number, since it uses less digits than its factorization.

40154643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 40154643 is about 6336.7691294539. The cubic root of 40154643 is about 342.4353489422.

Adding to 40154643 its reverse (34645104), we get a palindrome (74799747).

The spelling of 40154643 in words is "forty million, one hundred fifty-four thousand, six hundred forty-three".