61678800 has 120 divisors (see below), whose sum is σ = 219569280. Its totient is φ = 16444800.

The previous prime is 61678789. The next prime is 61678817. The reversal of 61678800 is 887616.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 7945 + ... + 13655.

It is an arithmetic number, because the mean of its divisors is an integer number (1829744).

Almost surely, 2^61678800 is an apocalyptic number.

61678800 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 61678800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109784640).

61678800 is an abundant number, since it is smaller than the sum of its proper divisors (157890480).

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

61678800 is a wasteful number, since it uses less digits than its factorization.

61678800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738 (or 5721 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 61678800 is about 7853.5851685711. The cubic root of 61678800 is about 395.1044962010.

The spelling of 61678800 in words is "sixty-one million, six hundred seventy-eight thousand, eight hundred".