71532428 has 24 divisors (see below), whose sum is σ = 136814160. Its totient is φ = 32454720.

The previous prime is 71532427. The next prime is 71532431. The reversal of 71532428 is 82423517.

It is a junction number, because it is equal to n+sod(n) for n = 71532394 and 71532403.

It is not an unprimeable number, because it can be changed into a prime (71532427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30050 + ... + 32342.

It is an arithmetic number, because the mean of its divisors is an integer number (5700590).

Almost surely, 2^71532428 is an apocalyptic number.

It is an amenable number.

71532428 is a deficient number, since it is larger than the sum of its proper divisors (65281732).

71532428 is a wasteful number, since it uses less digits than its factorization.

71532428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017 (or 3015 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 71532428 is about 8457.6845531150. The cubic root of 71532428 is about 415.1142628225.

The spelling of 71532428 in words is "seventy-one million, five hundred thirty-two thousand, four hundred twenty-eight".