71154638 has 8 divisors (see below), whose sum is σ = 108235440. Its totient is φ = 35076160.

The previous prime is 71154619. The next prime is 71154653. The reversal of 71154638 is 83645117.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71154638² = 10125965017822088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71154598 and 71154607.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250403 + ... + 250686.

It is an arithmetic number, because the mean of its divisors is an integer number (13529430).

Almost surely, 2^71154638 is an apocalyptic number.

71154638 is a deficient number, since it is larger than the sum of its proper divisors (37080802).

71154638 is a wasteful number, since it uses less digits than its factorization.

71154638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501162.

The product of its digits is 20160, while the sum is 35.

The square root of 71154638 is about 8435.3208593390. The cubic root of 71154638 is about 414.3821803220.

The spelling of 71154638 in words is "seventy-one million, one hundred fifty-four thousand, six hundred thirty-eight".