61900072 has 64 divisors (see below), whose sum is σ = 129548160. Its totient is φ = 27552000.

The previous prime is 61900063. The next prime is 61900079. The reversal of 61900072 is 27000916.

It is not an unprimeable number, because it can be changed into a prime (61900079) 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, 612822 + ... + 612922.

It is an arithmetic number, because the mean of its divisors is an integer number (2024190).

Almost surely, 2^61900072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61900072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64774080).

61900072 is an abundant number, since it is smaller than the sum of its proper divisors (67648088).

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

61900072 is a wasteful number, since it uses less digits than its factorization.

61900072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 61900072 is about 7867.6598808032. The cubic root of 61900072 is about 395.5764099644.

Adding to 61900072 its reverse (27000916), we get a palindrome (88900988).

The spelling of 61900072 in words is "sixty-one million, nine hundred thousand, seventy-two".