71923428 has 36 divisors (see below), whose sum is σ = 184526160. Its totient is φ = 23615856.

The previous prime is 71923421. The next prime is 71923433. The reversal of 71923428 is 82432917.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 71923392 and 71923401.

It is not an unprimeable number, because it can be changed into a prime (71923421) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12498 + ... + 17321.

Almost surely, 2^71923428 is an apocalyptic number.

It is an amenable number.

71923428 is an abundant number, since it is smaller than the sum of its proper divisors (112602732).

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

71923428 is a wasteful number, since it uses less digits than its factorization.

71923428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29896 (or 29891 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 71923428 is about 8480.7681255886. The cubic root of 71923428 is about 415.8692343555.

The spelling of 71923428 in words is "seventy-one million, nine hundred twenty-three thousand, four hundred twenty-eight".