61903890 has 48 divisors (see below), whose sum is σ = 162908928. Its totient is φ = 16306848.

The previous prime is 61903889. The next prime is 61903939. The reversal of 61903890 is 9830916.

61903890 is a `hidden beast` number, since 619 + 0 + 38 + 9 + 0 = 666.

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, 3327 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (3393936).

Almost surely, 2^61903890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61903890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81454464).

61903890 is an abundant number, since it is smaller than the sum of its proper divisors (101005038).

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

61903890 is a wasteful number, since it uses less digits than its factorization.

61903890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8383 (or 8380 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 61903890 is about 7867.9025159187. The cubic root of 61903890 is about 395.5845428557.

The spelling of 61903890 in words is "sixty-one million, nine hundred three thousand, eight hundred ninety".