68657420 has 48 divisors (see below), whose sum is σ = 155923488. Its totient is φ = 25244160.

The previous prime is 68657401. The next prime is 68657437. The reversal of 68657420 is 2475686.

It is a happy 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, 89840 + ... + 90600.

It is an arithmetic number, because the mean of its divisors is an integer number (3248406).

Almost surely, 2^68657420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68657420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77961744).

68657420 is an abundant number, since it is smaller than the sum of its proper divisors (87266068).

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

68657420 is a wasteful number, since it uses less digits than its factorization.

68657420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 68657420 is about 8285.9773110961. The cubic root of 68657420 is about 409.4766672107.

The spelling of 68657420 in words is "sixty-eight million, six hundred fifty-seven thousand, four hundred twenty".