68402880 has 560 divisors, whose sum is σ = 309798720. Its totient is φ = 13934592.

The previous prime is 68402857. The next prime is 68402903. The reversal of 68402880 is 8820486.

It is an interprime number because it is at equal distance from previous prime (68402857) and next prime (68402903).

It is a tau number, because it is divible by the number of its divisors (560).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2358706 + ... + 2358734.

It is an arithmetic number, because the mean of its divisors is an integer number (553212).

Almost surely, 2^68402880 is an apocalyptic number.

68402880 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 68402880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154899360).

68402880 is an abundant number, since it is smaller than the sum of its proper divisors (241395840).

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

68402880 is a wasteful number, since it uses less digits than its factorization.

68402880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 68402880 is about 8270.6033637214. The cubic root of 68402880 is about 408.9700103349.

The spelling of 68402880 in words is "sixty-eight million, four hundred two thousand, eight hundred eighty".