68102420 has 12 divisors (see below), whose sum is σ = 143015124. Its totient is φ = 27240960.

The previous prime is 68102417. The next prime is 68102423. The reversal of 68102420 is 2420186.

It is an interprime number because it is at equal distance from previous prime (68102417) and next prime (68102423).

It can be written as a sum of positive squares in 2 ways, for example, as 48636676 + 19465744 = 6974^2 + 4412^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68102423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702541 + ... + 1702580.

It is an arithmetic number, because the mean of its divisors is an integer number (11917927).

Almost surely, 2^68102420 is an apocalyptic number.

It is an amenable number.

68102420 is an abundant number, since it is smaller than the sum of its proper divisors (74912704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68102420 is a wasteful number, since it uses less digits than its factorization.

68102420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3405130 (or 3405128 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 68102420 is about 8252.4190392878. The cubic root of 68102420 is about 408.3703304901.

The spelling of 68102420 in words is "sixty-eight million, one hundred two thousand, four hundred twenty".