61890912 has 48 divisors (see below), whose sum is σ = 180517680. Its totient is φ = 20630016.

The previous prime is 61890887. The next prime is 61890943. The reversal of 61890912 is 21909816.

It is a tau number, because it is divible by the number of its divisors (48).

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 7 ways as a sum of consecutive naturals, for example, 34953 + ... + 36680.

It is an arithmetic number, because the mean of its divisors is an integer number (3760785).

Almost surely, 2^61890912 is an apocalyptic number.

It is an amenable number.

61890912 is an abundant number, since it is smaller than the sum of its proper divisors (118626768).

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

61890912 is a wasteful number, since it uses less digits than its factorization.

61890912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71652 (or 71638 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 61890912 is about 7867.0777293732. The cubic root of 61890912 is about 395.5568964778.

The spelling of 61890912 in words is "sixty-one million, eight hundred ninety thousand, nine hundred twelve".