71681700 has 36 divisors (see below), whose sum is σ = 207399920. Its totient is φ = 19115040.

The previous prime is 71681689. The next prime is 71681713. The reversal of 71681700 is 718617.

It is a super-2 number, since 2×71681700² = 10276532229780000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 11 ways as a sum of consecutive naturals, for example, 119170 + ... + 119769.

Almost surely, 2^71681700 is an apocalyptic number.

It is an amenable number.

71681700 is an abundant number, since it is smaller than the sum of its proper divisors (135718220).

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

71681700 is a wasteful number, since it uses less digits than its factorization.

71681700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238956 (or 238949 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 71681700 is about 8466.5045916246. The cubic root of 71681700 is about 415.4028120656.

The spelling of 71681700 in words is "seventy-one million, six hundred eighty-one thousand, seven hundred".