61000320 has 64 divisors (see below), whose sum is σ = 194444640. Its totient is φ = 16266240.

The previous prime is 61000283. The next prime is 61000337. The reversal of 61000320 is 2300016.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 61000296 and 61000305.

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, 13966 + ... + 17805.

Almost surely, 2^61000320 is an apocalyptic number.

61000320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61000320 is an abundant number, since it is smaller than the sum of its proper divisors (133444320).

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

61000320 is a wasteful number, since it uses less digits than its factorization.

61000320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31793 (or 31781 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 61000320 is about 7810.2701617806. The cubic root of 61000320 is about 393.6504066582.

Adding to 61000320 its reverse (2300016), we get a palindrome (63300336).

The spelling of 61000320 in words is "sixty-one million, three hundred twenty", and thus it is an aban number.