71501976 has 144 divisors (see below), whose sum is σ = 242751600. Its totient is φ = 18845568.

The previous prime is 71501939. The next prime is 71502037. The reversal of 71501976 is 67910517.

It is a super-2 number, since 2×71501976² = 10225065143809152, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 71501976.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45085 + ... + 46643.

It is an arithmetic number, because the mean of its divisors is an integer number (1685775).

Almost surely, 2^71501976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71501976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121375800).

71501976 is an abundant number, since it is smaller than the sum of its proper divisors (171249624).

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

71501976 is a wasteful number, since it uses less digits than its factorization.

71501976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 71501976 is about 8455.8841051661. The cubic root of 71501976 is about 415.0553484992.

The spelling of 71501976 in words is "seventy-one million, five hundred one thousand, nine hundred seventy-six".