61448490 has 64 divisors (see below), whose sum is σ = 168318720. Its totient is φ = 15940800.

The previous prime is 61448459. The next prime is 61448509. The reversal of 61448490 is 9484416.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6915 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (2629980).

Almost surely, 2^61448490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61448490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84159360).

61448490 is an abundant number, since it is smaller than the sum of its proper divisors (106870230).

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

61448490 is a wasteful number, since it uses less digits than its factorization.

61448490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6204 (or 6198 counting only the distinct ones).

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

The square root of 61448490 is about 7838.9087250714. The cubic root of 61448490 is about 394.6121065249.

The spelling of 61448490 in words is "sixty-one million, four hundred forty-eight thousand, four hundred ninety".