61243770 has 64 divisors (see below), whose sum is σ = 170864640. Its totient is φ = 13758528.

The previous prime is 61243753. The next prime is 61243789. The reversal of 61243770 is 7734216.

61243770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9919 + ... + 14861.

It is an arithmetic number, because the mean of its divisors is an integer number (2669760).

Almost surely, 2^61243770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61243770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85432320).

61243770 is an abundant number, since it is smaller than the sum of its proper divisors (109620870).

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

61243770 is a wasteful number, since it uses less digits than its factorization.

61243770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 61243770 is about 7825.8398910277. The cubic root of 61243770 is about 394.1733928939.

Adding to 61243770 its reverse (7734216), we get a palindrome (68977986).

The spelling of 61243770 in words is "sixty-one million, two hundred forty-three thousand, seven hundred seventy".