71442930 has 64 divisors (see below), whose sum is σ = 189681408. Its totient is φ = 17107200.

The previous prime is 71442919. The next prime is 71442947. The reversal of 71442930 is 3924417.

71442930 = T₁₄ + T₁₅ + ... + T₇₅₃.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11955 + ... + 16905.

It is an arithmetic number, because the mean of its divisors is an integer number (2963772).

Almost surely, 2^71442930 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71442930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94840704).

71442930 is an abundant number, since it is smaller than the sum of its proper divisors (118238478).

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

71442930 is a wasteful number, since it uses less digits than its factorization.

71442930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 71442930 is about 8452.3919691410. The cubic root of 71442930 is about 414.9410667754.

The spelling of 71442930 in words is "seventy-one million, four hundred forty-two thousand, nine hundred thirty".