71345990 has 32 divisors (see below), whose sum is σ = 132871104. Its totient is φ = 27561600.

The previous prime is 71345959. The next prime is 71345993. The reversal of 71345990 is 9954317.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71345993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55232 + ... + 56508.

It is an arithmetic number, because the mean of its divisors is an integer number (4152222).

Almost surely, 2^71345990 is an apocalyptic number.

71345990 is a deficient number, since it is larger than the sum of its proper divisors (61525114).

71345990 is a wasteful number, since it uses less digits than its factorization.

71345990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 71345990 is about 8446.6555511634. The cubic root of 71345990 is about 414.7533057468.

The spelling of 71345990 in words is "seventy-one million, three hundred forty-five thousand, nine hundred ninety".