71923530 has 64 divisors (see below), whose sum is σ = 205867008. Its totient is φ = 15723840.

The previous prime is 71923513. The next prime is 71923543. The reversal of 71923530 is 3532917.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2616 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (3216672).

Almost surely, 2^71923530 is an apocalyptic number.

71923530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71923530 is an abundant number, since it is smaller than the sum of its proper divisors (133943478).

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

71923530 is a wasteful number, since it uses less digits than its factorization.

71923530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14931.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 71923530 is about 8480.7741391927. The cubic root of 71923530 is about 415.8694309472.

The spelling of 71923530 in words is "seventy-one million, nine hundred twenty-three thousand, five hundred thirty".