61350440 has 32 divisors (see below), whose sum is σ = 141772680. Its totient is φ = 23876352.

The previous prime is 61350431. The next prime is 61350469. The reversal of 61350440 is 4405316.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47969476 + 13380964 = 6926^2 + 3658^2 .

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, 19247 + ... + 22206.

Almost surely, 2^61350440 is an apocalyptic number.

It is an amenable number.

61350440 is an abundant number, since it is smaller than the sum of its proper divisors (80422240).

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

61350440 is a wasteful number, since it uses less digits than its factorization.

61350440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41501 (or 41497 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 61350440 is about 7832.6521689655. The cubic root of 61350440 is about 394.4021077942.

Adding to 61350440 its reverse (4405316), we get a palindrome (65755756).

The spelling of 61350440 in words is "sixty-one million, three hundred fifty thousand, four hundred forty".