40154642 has 16 divisors (see below), whose sum is σ = 68565312. Its totient is φ = 17458320.

The previous prime is 40154623. The next prime is 40154651. The reversal of 40154642 is 24645104.

It is a super-2 number, since 2×40154642² = 3224790548296328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39173 + ... + 40184.

It is an arithmetic number, because the mean of its divisors is an integer number (4285332).

Almost surely, 2^40154642 is an apocalyptic number.

40154642 is a deficient number, since it is larger than the sum of its proper divisors (28410670).

40154642 is a wasteful number, since it uses less digits than its factorization.

40154642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79393.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 40154642 is about 6336.7690505493. The cubic root of 40154642 is about 342.4353460996.

Adding to 40154642 its reverse (24645104), we get a palindrome (64799746).

The spelling of 40154642 in words is "forty million, one hundred fifty-four thousand, six hundred forty-two".