71573240 has 32 divisors (see below), whose sum is σ = 168043680. Its totient is φ = 27384192.

The previous prime is 71573233. The next prime is 71573251. The reversal of 71573240 is 4237517.

It is a congruent number.

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, 37979 + ... + 39818.

It is an arithmetic number, because the mean of its divisors is an integer number (5251365).

Almost surely, 2^71573240 is an apocalyptic number.

It is an amenable number.

71573240 is an abundant number, since it is smaller than the sum of its proper divisors (96470440).

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

71573240 is a wasteful number, since it uses less digits than its factorization.

71573240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77831 (or 77827 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 71573240 is about 8460.0969261587. The cubic root of 71573240 is about 415.1931940281.

The spelling of 71573240 in words is "seventy-one million, five hundred seventy-three thousand, two hundred forty".