61248720 has 160 divisors (see below), whose sum is σ = 208236672. Its totient is φ = 14800896.

The previous prime is 61248709. The next prime is 61248721. The reversal of 61248720 is 2784216.

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 (61248721) 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, 208894 + ... + 209186.

Almost surely, 2^61248720 is an apocalyptic number.

61248720 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 61248720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104118336).

61248720 is an abundant number, since it is smaller than the sum of its proper divisors (146987952).

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

61248720 is a wasteful number, since it uses less digits than its factorization.

61248720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 61248720 is about 7826.1561446217. The cubic root of 61248720 is about 394.1840122365.

The spelling of 61248720 in words is "sixty-one million, two hundred forty-eight thousand, seven hundred twenty".