71381390 has 16 divisors (see below), whose sum is σ = 128692800. Its totient is φ = 28506720.

The previous prime is 71381381. The next prime is 71381467. The reversal of 71381390 is 9318317.

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, 1211 + ... + 12009.

It is an arithmetic number, because the mean of its divisors is an integer number (8043300).

Almost surely, 2^71381390 is an apocalyptic number.

71381390 is a deficient number, since it is larger than the sum of its proper divisors (57311410).

71381390 is a wasteful number, since it uses less digits than its factorization.

71381390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11467.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 71381390 is about 8448.7507952359. The cubic root of 71381390 is about 414.8218909580.

The spelling of 71381390 in words is "seventy-one million, three hundred eighty-one thousand, three hundred ninety".