71420392 has 32 divisors (see below), whose sum is σ = 143085600. Its totient is φ = 33321024.

The previous prime is 71420381. The next prime is 71420413. The reversal of 71420392 is 29302417.

It is a self number, because there is not a number n which added to its sum of digits gives 71420392.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6678 + ... + 13690.

It is an arithmetic number, because the mean of its divisors is an integer number (4471425).

Almost surely, 2^71420392 is an apocalyptic number.

It is an amenable number.

71420392 is an abundant number, since it is smaller than the sum of its proper divisors (71665208).

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

71420392 is a wasteful number, since it uses less digits than its factorization.

71420392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7105 (or 7101 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 71420392 is about 8451.0586319112. The cubic root of 71420392 is about 414.8974285626.

The spelling of 71420392 in words is "seventy-one million, four hundred twenty thousand, three hundred ninety-two".