71898742 has 4 divisors (see below), whose sum is σ = 107848116. Its totient is φ = 35949370.

The previous prime is 71898737. The next prime is 71898779. The reversal of 71898742 is 24789817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24789817 = 13 ⋅1906909.

It is a junction number, because it is equal to n+sod(n) for n = 71898692 and 71898701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17974684 + ... + 17974687.

It is an arithmetic number, because the mean of its divisors is an integer number (26962029).

Almost surely, 2^71898742 is an apocalyptic number.

71898742 is a deficient number, since it is larger than the sum of its proper divisors (35949374).

71898742 is a wasteful number, since it uses less digits than its factorization.

71898742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35949373.

The product of its digits is 225792, while the sum is 46.

The square root of 71898742 is about 8479.3125900629. The cubic root of 71898742 is about 415.8216498481.

It can be divided in two parts, 7189 and 8742, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 71898742 in words is "seventy-one million, eight hundred ninety-eight thousand, seven hundred forty-two".