61878804 has 48 divisors (see below), whose sum is σ = 157489920. Its totient is φ = 18794880.

The previous prime is 61878781. The next prime is 61878811. The reversal of 61878804 is 40887816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9814 + ... + 14834.

It is an arithmetic number, because the mean of its divisors is an integer number (3281040).

Almost surely, 2^61878804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61878804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78744960).

61878804 is an abundant number, since it is smaller than the sum of its proper divisors (95611116).

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

61878804 is a wasteful number, since it uses less digits than its factorization.

61878804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120 (or 5118 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 61878804 is about 7866.3081556725. The cubic root of 61878804 is about 395.5310999319.

The spelling of 61878804 in words is "sixty-one million, eight hundred seventy-eight thousand, eight hundred four".