61988472 has 96 divisors (see below), whose sum is σ = 206650080. Its totient is φ = 16346880.

The previous prime is 61988471. The next prime is 61988483. The reversal of 61988472 is 27488916.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61988471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1822 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (2152605).

Almost surely, 2^61988472 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 61988472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103325040).

61988472 is an abundant number, since it is smaller than the sum of its proper divisors (144661608).

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

61988472 is a wasteful number, since it uses less digits than its factorization.

61988472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493 (or 9486 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 61988472 is about 7873.2758112491. The cubic root of 61988472 is about 395.7646290311.

The spelling of 61988472 in words is "sixty-one million, nine hundred eighty-eight thousand, four hundred seventy-two".