71738780 has 24 divisors (see below), whose sum is σ = 151100208. Its totient is φ = 28610048.

The previous prime is 71738761. The next prime is 71738783. The reversal of 71738780 is 8783717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71738783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1772 + ... + 12108.

It is an arithmetic number, because the mean of its divisors is an integer number (6295842).

Almost surely, 2^71738780 is an apocalyptic number.

It is an amenable number.

71738780 is an abundant number, since it is smaller than the sum of its proper divisors (79361428).

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

71738780 is a wasteful number, since it uses less digits than its factorization.

71738780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10693 (or 10691 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 71738780 is about 8469.8748514957. The cubic root of 71738780 is about 415.5130442986.

The spelling of 71738780 in words is "seventy-one million, seven hundred thirty-eight thousand, seven hundred eighty".