61683804 has 144 divisors (see below), whose sum is σ = 202209280. Its totient is φ = 15396480.

The previous prime is 61683799. The next prime is 61683821. The reversal of 61683804 is 40838616.

It is a happy number.

61683804 is a `hidden beast` number, since 616 + 8 + 38 + 0 + 4 = 666.

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 47 ways as a sum of consecutive naturals, for example, 61749 + ... + 62739.

Almost surely, 2^61683804 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 61683804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101104640).

61683804 is an abundant number, since it is smaller than the sum of its proper divisors (140525476).

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

61683804 is a wasteful number, since it uses less digits than its factorization.

61683804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040 (or 1035 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 61683804 is about 7853.9037427257. The cubic root of 61683804 is about 395.1151808525.

It can be divided in two parts, 61 and 683804, that added together give a triangular number (683865 = T₁₁₆₉).

The spelling of 61683804 in words is "sixty-one million, six hundred eighty-three thousand, eight hundred four".