71749380 has 48 divisors (see below), whose sum is σ = 203454720. Its totient is φ = 18889728.

The previous prime is 71749361. The next prime is 71749387. The reversal of 71749380 is 8394717.

It is not an unprimeable number, because it can be changed into a prime (71749387) by changing a digit.

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, 2829 + ... + 12308.

It is an arithmetic number, because the mean of its divisors is an integer number (4238640).

Almost surely, 2^71749380 is an apocalyptic number.

It is an amenable number.

71749380 is an abundant number, since it is smaller than the sum of its proper divisors (131705340).

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

71749380 is a wasteful number, since it uses less digits than its factorization.

71749380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15228 (or 15226 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 71749380 is about 8470.5005755268. The cubic root of 71749380 is about 415.5335084574.

The spelling of 71749380 in words is "seventy-one million, seven hundred forty-nine thousand, three hundred eighty".