71630490 has 32 divisors (see below), whose sum is σ = 172259136. Its totient is φ = 19063040.

The previous prime is 71630479. The next prime is 71630497. The reversal of 71630490 is 9403617.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (71630497) 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, 14770 + ... + 19010.

It is an arithmetic number, because the mean of its divisors is an integer number (5383098).

Almost surely, 2^71630490 is an apocalyptic number.

71630490 is an abundant number, since it is smaller than the sum of its proper divisors (100628646).

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

71630490 is a wasteful number, since it uses less digits than its factorization.

71630490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4814.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 71630490 is about 8463.4797807994. The cubic root of 71630490 is about 415.3038660964.

The spelling of 71630490 in words is "seventy-one million, six hundred thirty thousand, four hundred ninety".