81740300 has 18 divisors (see below), whose sum is σ = 177376668. Its totient is φ = 32696080.

The previous prime is 81740297. The next prime is 81740341. The reversal of 81740300 is 304718.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408602 + ... + 408801.

Almost surely, 2^81740300 is an apocalyptic number.

It is an amenable number.

81740300 is an abundant number, since it is smaller than the sum of its proper divisors (95636368).

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

81740300 is a wasteful number, since it uses less digits than its factorization.

81740300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817417 (or 817410 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 81740300 is about 9041.0342328740. The cubic root of 81740300 is about 433.9890205127.

The spelling of 81740300 in words is "eighty-one million, seven hundred forty thousand, three hundred".