61334440 has 32 divisors (see below), whose sum is σ = 139351680. Its totient is φ = 24293952.

The previous prime is 61334437. The next prime is 61334459. The reversal of 61334440 is 4443316.

It is a happy number.

It is a super-2 number, since 2×61334440² = 7523827060227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3324 + ... + 11563.

It is an arithmetic number, because the mean of its divisors is an integer number (4354740).

Almost surely, 2^61334440 is an apocalyptic number.

It is an amenable number.

61334440 is an abundant number, since it is smaller than the sum of its proper divisors (78017240).

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

61334440 is a wasteful number, since it uses less digits than its factorization.

61334440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15001 (or 14997 counting only the distinct ones).

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

The square root of 61334440 is about 7831.6307369538. The cubic root of 61334440 is about 394.3678185406.

Adding to 61334440 its reverse (4443316), we get a palindrome (65777756).

It can be divided in two parts, 613 and 34440, that added together give a palindrome (35053).

The spelling of 61334440 in words is "sixty-one million, three hundred thirty-four thousand, four hundred forty".