68440479 has 16 divisors (see below), whose sum is σ = 95424000. Its totient is φ = 43550496.

The previous prime is 68440469. The next prime is 68440481. The reversal of 68440479 is 97404486.

It is not a de Polignac number, because 68440479 - 2¹¹ = 68438431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68440479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68440459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48222 + ... + 49620.

It is an arithmetic number, because the mean of its divisors is an integer number (5964000).

Almost surely, 2^68440479 is an apocalyptic number.

68440479 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

68440479 is a deficient number, since it is larger than the sum of its proper divisors (26983521).

68440479 is a wasteful number, since it uses less digits than its factorization.

68440479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 68440479 is about 8272.8761020579. The cubic root of 68440479 is about 409.0449294361.

The spelling of 68440479 in words is "sixty-eight million, four hundred forty thousand, four hundred seventy-nine".