61072860 has 24 divisors (see below), whose sum is σ = 171004176. Its totient is φ = 16286080.

The previous prime is 61072853. The next prime is 61072861. The reversal of 61072860 is 6827016.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61072861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508881 + ... + 509000.

It is an arithmetic number, because the mean of its divisors is an integer number (7125174).

Almost surely, 2^61072860 is an apocalyptic number.

61072860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61072860 is an abundant number, since it is smaller than the sum of its proper divisors (109931316).

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

61072860 is a wasteful number, since it uses less digits than its factorization.

61072860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017893 (or 1017891 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61072860 is about 7814.9126674583. The cubic root of 61072860 is about 393.8063844676.

Adding to 61072860 its reverse (6827016), we get a palindrome (67899876).

The spelling of 61072860 in words is "sixty-one million, seventy-two thousand, eight hundred sixty".