61720232 has 16 divisors (see below), whose sum is σ = 132257760. Its totient is φ = 26451504.

The previous prime is 61720231. The next prime is 61720237. The reversal of 61720232 is 23202716.

It is a junction number, because it is equal to n+sod(n) for n = 61720198 and 61720207.

It is not an unprimeable number, because it can be changed into a prime (61720231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551018 + ... + 551129.

It is an arithmetic number, because the mean of its divisors is an integer number (8266110).

Almost surely, 2^61720232 is an apocalyptic number.

It is an amenable number.

61720232 is an abundant number, since it is smaller than the sum of its proper divisors (70537528).

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

61720232 is a wasteful number, since it uses less digits than its factorization.

61720232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102160 (or 1102156 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 61720232 is about 7856.2225019407. Note that the first 3 decimals coincide. The cubic root of 61720232 is about 395.1929453138.

Adding to 61720232 its reverse (23202716), we get a palindrome (84922948).

The spelling of 61720232 in words is "sixty-one million, seven hundred twenty thousand, two hundred thirty-two".