61343240 has 32 divisors (see below), whose sum is σ = 157740480. Its totient is φ = 21031872.

The previous prime is 61343221. The next prime is 61343251. The reversal of 61343240 is 4234316.

It is a happy number.

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, 109262 + ... + 109821.

It is an arithmetic number, because the mean of its divisors is an integer number (4929390).

Almost surely, 2^61343240 is an apocalyptic number.

It is an amenable number.

61343240 is an abundant number, since it is smaller than the sum of its proper divisors (96397240).

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

61343240 is a wasteful number, since it uses less digits than its factorization.

61343240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219101 (or 219097 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 61343240 is about 7832.1925410449. The cubic root of 61343240 is about 394.3866783679.

Adding to 61343240 its reverse (4234316), we get a palindrome (65577556).

The spelling of 61343240 in words is "sixty-one million, three hundred forty-three thousand, two hundred forty".