71744990 has 32 divisors (see below), whose sum is σ = 131220000. Its totient is φ = 28240768.

The previous prime is 71744971. The next prime is 71745001. The reversal of 71744990 is 9944717.

It is a happy number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266576 + ... + 266844.

It is an arithmetic number, because the mean of its divisors is an integer number (4100625).

Almost surely, 2^71744990 is an apocalyptic number.

71744990 is a deficient number, since it is larger than the sum of its proper divisors (59475010).

71744990 is a wasteful number, since it uses less digits than its factorization.

71744990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 71744990 is about 8470.2414369367. The cubic root of 71744990 is about 415.5250334512.

The spelling of 71744990 in words is "seventy-one million, seven hundred forty-four thousand, nine hundred ninety".