61990080 has 112 divisors (see below), whose sum is σ = 203265024. Its totient is φ = 15989760.

The previous prime is 61990079. The next prime is 61990087. The reversal of 61990080 is 8009916.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (61990087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28719 + ... + 30801.

Almost surely, 2^61990080 is an apocalyptic number.

61990080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61990080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101632512).

61990080 is an abundant number, since it is smaller than the sum of its proper divisors (141274944).

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

61990080 is a wasteful number, since it uses less digits than its factorization.

61990080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 2124 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 61990080 is about 7873.3779281830. The cubic root of 61990080 is about 395.7680510869.

Adding to 61990080 its reverse (8009916), we get a palindrome (69999996).

The spelling of 61990080 in words is "sixty-one million, nine hundred ninety thousand, eighty".