61320340 has 12 divisors (see below), whose sum is σ = 128772756. Its totient is φ = 24528128.

The previous prime is 61320319. The next prime is 61320349. The reversal of 61320340 is 4302316.

It can be written as a sum of positive squares in 2 ways, for example, as 48944016 + 12376324 = 6996^2 + 3518^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61320349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532989 + ... + 1533028.

It is an arithmetic number, because the mean of its divisors is an integer number (10731063).

Almost surely, 2^61320340 is an apocalyptic number.

It is an amenable number.

61320340 is an abundant number, since it is smaller than the sum of its proper divisors (67452416).

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

61320340 is a wasteful number, since it uses less digits than its factorization.

61320340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3066026 (or 3066024 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 61320340 is about 7830.7304895520. The cubic root of 61320340 is about 394.3375961924.

Adding to 61320340 its reverse (4302316), we get a palindrome (65622656).

The spelling of 61320340 in words is "sixty-one million, three hundred twenty thousand, three hundred forty".