40154440 has 32 divisors (see below), whose sum is σ = 91702080. Its totient is φ = 15820992.

The previous prime is 40154431. The next prime is 40154441. The reversal of 40154440 is 4445104.

It is a super-2 number, since 2×40154440² = 3224758103427200, which contains 22 as substring.

40154440 is a modest number, since divided by 154440 gives 40 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40154441) by changing a digit.

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, 4812 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (2865690).

Almost surely, 2^40154440 is an apocalyptic number.

40154440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40154440 is an abundant number, since it is smaller than the sum of its proper divisors (51547640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40154440 is a wasteful number, since it uses less digits than its factorization.

40154440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15061 (or 15057 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40154440 is about 6336.7531118073. The cubic root of 40154440 is about 342.4347718857.

Adding to 40154440 its reverse (4445104), we get a palindrome (44599544).

The spelling of 40154440 in words is "forty million, one hundred fifty-four thousand, four hundred forty".