40172044 has 24 divisors (see below), whose sum is σ = 76910400. Its totient is φ = 18208080.

The previous prime is 40172021. The next prime is 40172051. The reversal of 40172044 is 44027104.

It is a super-2 number, since 2×40172044² = 3227586238275872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17347 + ... + 19525.

It is an arithmetic number, because the mean of its divisors is an integer number (3204600).

Almost surely, 2^40172044 is an apocalyptic number.

40172044 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40172044 is a deficient number, since it is larger than the sum of its proper divisors (36738356).

40172044 is a wasteful number, since it uses less digits than its factorization.

40172044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613 (or 2611 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 40172044 is about 6338.1419990404. The cubic root of 40172044 is about 342.4848065436.

Adding to 40172044 its reverse (44027104), we get a palindrome (84199148).

The spelling of 40172044 in words is "forty million, one hundred seventy-two thousand, forty-four".