71843780 has 24 divisors (see below), whose sum is σ = 151041408. Its totient is φ = 28705248.

The previous prime is 71843741. The next prime is 71843797. The reversal of 71843780 is 8734817.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25187 + ... + 27893.

It is an arithmetic number, because the mean of its divisors is an integer number (6293392).

Almost surely, 2^71843780 is an apocalyptic number.

It is an amenable number.

71843780 is an abundant number, since it is smaller than the sum of its proper divisors (79197628).

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

71843780 is a wasteful number, since it uses less digits than its factorization.

71843780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043 (or 4041 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 71843780 is about 8476.0710237704. The cubic root of 71843780 is about 415.7156664658.

The spelling of 71843780 in words is "seventy-one million, eight hundred forty-three thousand, seven hundred eighty".