71923144 has 16 divisors (see below), whose sum is σ = 136051020. Its totient is φ = 35642880.

The previous prime is 71923127. The next prime is 71923147. The reversal of 71923144 is 44132917.

It can be written as a sum of positive squares in 2 ways, for example, as 54199044 + 17724100 = 7362^2 + 4210^2 .

It is not an unprimeable number, because it can be changed into a prime (71923147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38877 + ... + 40684.

Almost surely, 2^71923144 is an apocalyptic number.

It is an amenable number.

71923144 is a deficient number, since it is larger than the sum of its proper divisors (64127876).

71923144 is a wasteful number, since it uses less digits than its factorization.

71923144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79680 (or 79676 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 71923144 is about 8480.7513818057. The cubic root of 71923144 is about 415.8686869816.

The spelling of 71923144 in words is "seventy-one million, nine hundred twenty-three thousand, one hundred forty-four".