68621340 has 48 divisors (see below), whose sum is σ = 195300000. Its totient is φ = 17998080.

The previous prime is 68621327. The next prime is 68621393. The reversal of 68621340 is 4312686.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 68621298 and 68621307.

It is a congruent 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, 5715 + ... + 13034.

It is an arithmetic number, because the mean of its divisors is an integer number (4068750).

Almost surely, 2^68621340 is an apocalyptic number.

68621340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68621340 is an abundant number, since it is smaller than the sum of its proper divisors (126678660).

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

68621340 is a wasteful number, since it uses less digits than its factorization.

68621340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18822 (or 18820 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 68621340 is about 8283.7998527246. The cubic root of 68621340 is about 409.4049269344.

The spelling of 68621340 in words is "sixty-eight million, six hundred twenty-one thousand, three hundred forty".