68244391 has 8 divisors (see below), whose sum is σ = 71137520. Its totient is φ = 65406528.

The previous prime is 68244389. The next prime is 68244437. The reversal of 68244391 is 19344286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68244391 - 2¹ = 68244389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68244391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68244331) 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, 11286 + ... + 16243.

It is an arithmetic number, because the mean of its divisors is an integer number (8892190).

Almost surely, 2^68244391 is an apocalyptic number.

68244391 is the 4770-th hex number.

68244391 is a deficient number, since it is larger than the sum of its proper divisors (2893129).

68244391 is a wasteful number, since it uses less digits than its factorization.

68244391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27633.

The product of its digits is 41472, while the sum is 37.

The square root of 68244391 is about 8261.0163418311. The cubic root of 68244391 is about 408.6539058430.

It can be divided in two parts, 68244 and 391, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 68244391 in words is "sixty-eight million, two hundred forty-four thousand, three hundred ninety-one".