68408780 has 24 divisors (see below), whose sum is σ = 156718800. Its totient is φ = 24875840.

The previous prime is 68408771. The next prime is 68408807. The reversal of 68408780 is 8780486.

It is a happy number.

It is a super-2 number, since 2×68408780² = 9359522362176800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155255 + ... + 155694.

It is an arithmetic number, because the mean of its divisors is an integer number (6529950).

Almost surely, 2^68408780 is an apocalyptic number.

It is an amenable number.

68408780 is an abundant number, since it is smaller than the sum of its proper divisors (88310020).

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

68408780 is a wasteful number, since it uses less digits than its factorization.

68408780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310969 (or 310967 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 68408780 is about 8270.9600410110. The cubic root of 68408780 is about 408.9817683861.

The spelling of 68408780 in words is "sixty-eight million, four hundred eight thousand, seven hundred eighty".