61434340 has 48 divisors (see below), whose sum is σ = 143156160. Its totient is φ = 21956480.

The previous prime is 61434323. The next prime is 61434389. The reversal of 61434340 is 4343416.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10614 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (2982420).

Almost surely, 2^61434340 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 61434340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71578080).

61434340 is an abundant number, since it is smaller than the sum of its proper divisors (81721820).

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

61434340 is a wasteful number, since it uses less digits than its factorization.

61434340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812 (or 4810 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 61434340 is about 7838.0061240088. The cubic root of 61434340 is about 394.5818145413.

Adding to 61434340 its reverse (4343416), we get a palindrome (65777756).

The spelling of 61434340 in words is "sixty-one million, four hundred thirty-four thousand, three hundred forty".