71918030 has 16 divisors (see below), whose sum is σ = 131277024. Its totient is φ = 28361760.

The previous prime is 71918027. The next prime is 71918039. The reversal of 71918030 is 3081917.

It is a junction number, because it is equal to n+sod(n) for n = 71917984 and 71918002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71918039) 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, 49937 + ... + 51356.

It is an arithmetic number, because the mean of its divisors is an integer number (8204814).

Almost surely, 2^71918030 is an apocalyptic number.

71918030 is a deficient number, since it is larger than the sum of its proper divisors (59358994).

71918030 is a wasteful number, since it uses less digits than its factorization.

71918030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101371.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 71918030 is about 8480.4498701425. The cubic root of 71918030 is about 415.8588301504.

Adding to 71918030 its reverse (3081917), we get a palindrome (74999947).

The spelling of 71918030 in words is "seventy-one million, nine hundred eighteen thousand, thirty".