61489320 has 128 divisors (see below), whose sum is σ = 196560000. Its totient is φ = 15344640.

The previous prime is 61489319. The next prime is 61489321. The reversal of 61489320 is 2398416.

It is an interprime number because it is at equal distance from previous prime (61489319) and next prime (61489321).

It is not an unprimeable number, because it can be changed into a prime (61489321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 339630 + ... + 339810.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^61489320 is an apocalyptic number.

61489320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61489320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98280000).

61489320 is an abundant number, since it is smaller than the sum of its proper divisors (135070680).

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

61489320 is a wasteful number, since it uses less digits than its factorization.

61489320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 61489320 is about 7841.5126091845. The cubic root of 61489320 is about 394.6994883577.

The spelling of 61489320 in words is "sixty-one million, four hundred eighty-nine thousand, three hundred twenty".