71652978 has 32 divisors (see below), whose sum is σ = 160729920. Its totient is φ = 23659200.

The previous prime is 71652941. The next prime is 71652989. The reversal of 71652978 is 87925617.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423 + ... + 11978.

It is an arithmetic number, because the mean of its divisors is an integer number (5022810).

Almost surely, 2^71652978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71652978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80364960).

71652978 is an abundant number, since it is smaller than the sum of its proper divisors (89076942).

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

71652978 is a wasteful number, since it uses less digits than its factorization.

71652978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519 (or 12513 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 71652978 is about 8464.8082081049. The cubic root of 71652978 is about 415.3473223405.

The spelling of 71652978 in words is "seventy-one million, six hundred fifty-two thousand, nine hundred seventy-eight".