61969400 has 48 divisors (see below), whose sum is σ = 144633600. Its totient is φ = 24692480.

The previous prime is 61969399. The next prime is 61969423. The reversal of 61969400 is 496916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76196 + ... + 77004.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^61969400 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 61969400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72316800).

61969400 is an abundant number, since it is smaller than the sum of its proper divisors (82664200).

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

61969400 is a wasteful number, since it uses less digits than its factorization.

61969400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208 (or 1199 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 61969400 is about 7872.0645322558. The cubic root of 61969400 is about 395.7240365522.

The spelling of 61969400 in words is "sixty-one million, nine hundred sixty-nine thousand, four hundred".