68651040 has 96 divisors (see below), whose sum is σ = 218816640. Its totient is φ = 18089984.

The previous prime is 68651039. The next prime is 68651041. The reversal of 68651040 is 4015686.

It is an interprime number because it is at equal distance from previous prime (68651039) and next prime (68651041).

It is a tau number, because it is divible by the number of its divisors (96).

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 = 68650989 and 68651007.

It is not an unprimeable number, because it can be changed into a prime (68651041) 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, 41917 + ... + 43523.

It is an arithmetic number, because the mean of its divisors is an integer number (2279340).

Almost surely, 2^68651040 is an apocalyptic number.

68651040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68651040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109408320).

68651040 is an abundant number, since it is smaller than the sum of its proper divisors (150165600).

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

68651040 is a wasteful number, since it uses less digits than its factorization.

68651040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714 (or 1706 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 68651040 is about 8285.5923143732. The cubic root of 68651040 is about 409.4639832597.

The spelling of 68651040 in words is "sixty-eight million, six hundred fifty-one thousand, forty".