71900008 has 8 divisors (see below), whose sum is σ = 134812530. Its totient is φ = 35950000.

The previous prime is 71899973. The next prime is 71900051. The reversal of 71900008 is 80000917.

It can be written as a sum of positive squares in only one way, i.e., 69522244 + 2377764 = 8338^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×71900008² = 10339222300800128, 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 as a sum of consecutive naturals, namely, 4493743 + ... + 4493758.

Almost surely, 2^71900008 is an apocalyptic number.

It is an amenable number.

71900008 is a deficient number, since it is larger than the sum of its proper divisors (62912522).

71900008 is a wasteful number, since it uses less digits than its factorization.

71900008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987507 (or 8987503 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 71900008 is about 8479.3872420122. The cubic root of 71900008 is about 415.8240904430.

The spelling of 71900008 in words is "seventy-one million, nine hundred thousand, eight".