71649746 has 32 divisors (see below), whose sum is σ = 127277568. Its totient is φ = 29615040.

The previous prime is 71649737. The next prime is 71649757. The reversal of 71649746 is 64794617.

It is a super-2 number, since 2×71649746² = 10267372203729032, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71649697 and 71649706.

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 15 ways as a sum of consecutive naturals, for example, 44471 + ... + 46053.

It is an arithmetic number, because the mean of its divisors is an integer number (3977424).

Almost surely, 2^71649746 is an apocalyptic number.

71649746 is a deficient number, since it is larger than the sum of its proper divisors (55627822).

71649746 is a wasteful number, since it uses less digits than its factorization.

71649746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706.

The product of its digits is 254016, while the sum is 44.

The square root of 71649746 is about 8464.6172979054. The cubic root of 71649746 is about 415.3410773210.

The spelling of 71649746 in words is "seventy-one million, six hundred forty-nine thousand, seven hundred forty-six".