68438515 has 8 divisors (see below), whose sum is σ = 86957280. Its totient is φ = 51530112.

The previous prime is 68438479. The next prime is 68438519. The reversal of 68438515 is 51583486.

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

It is a cyclic number.

It is not a de Polignac number, because 68438515 - 2⁷ = 68438387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68438519) 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, 402495 + ... + 402664.

It is an arithmetic number, because the mean of its divisors is an integer number (10869660).

Almost surely, 2^68438515 is an apocalyptic number.

68438515 is a deficient number, since it is larger than the sum of its proper divisors (18518765).

68438515 is a wasteful number, since it uses less digits than its factorization.

68438515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805181.

The product of its digits is 115200, while the sum is 40.

The square root of 68438515 is about 8272.7574000450. The cubic root of 68438515 is about 409.0410166838.

The spelling of 68438515 in words is "sixty-eight million, four hundred thirty-eight thousand, five hundred fifteen".