61723080 has 128 divisors (see below), whose sum is σ = 209059200. Its totient is φ = 16194816.

The previous prime is 61723061. The next prime is 61723091. The reversal of 61723080 is 8032716.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 71934 + ... + 72786.

It is an arithmetic number, because the mean of its divisors is an integer number (1633275).

Almost surely, 2^61723080 is an apocalyptic number.

61723080 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 61723080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104529600).

61723080 is an abundant number, since it is smaller than the sum of its proper divisors (147336120).

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

61723080 is a wasteful number, since it uses less digits than its factorization.

61723080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 61723080 is about 7856.4037574453. The cubic root of 61723080 is about 395.1990237755.

Adding to 61723080 its reverse (8032716), we get a palindrome (69755796).

The spelling of 61723080 in words is "sixty-one million, seven hundred twenty-three thousand, eighty".