71979030 has 96 divisors (see below), whose sum is σ = 204422400. Its totient is φ = 18172512.

The previous prime is 71979013. The next prime is 71979031. The reversal of 71979030 is 3097917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71979031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45391 + ... + 46949.

It is an arithmetic number, because the mean of its divisors is an integer number (2129400).

Almost surely, 2^71979030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71979030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102211200).

71979030 is an abundant number, since it is smaller than the sum of its proper divisors (132443370).

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

71979030 is a wasteful number, since it uses less digits than its factorization.

71979030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1588 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 71979030 is about 8484.0456151532. The cubic root of 71979030 is about 415.9763723945.

The spelling of 71979030 in words is "seventy-one million, nine hundred seventy-nine thousand, thirty".