68819040 has 72 divisors (see below), whose sum is σ = 234849888. Its totient is φ = 18351360.

The previous prime is 68819011. The next prime is 68819087. The reversal of 68819040 is 4091886.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68818986 and 68819004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22456 + ... + 25335.

It is an arithmetic number, because the mean of its divisors is an integer number (3261804).

Almost surely, 2^68819040 is an apocalyptic number.

68819040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68819040 is an abundant number, since it is smaller than the sum of its proper divisors (166030848).

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

68819040 is a wasteful number, since it uses less digits than its factorization.

68819040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47812 (or 47801 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 68819040 is about 8295.7241998514. The cubic root of 68819040 is about 409.7977189760.

The spelling of 68819040 in words is "sixty-eight million, eight hundred nineteen thousand, forty".