61339240 has 16 divisors (see below), whose sum is σ = 138013380. Its totient is φ = 24535680.

The previous prime is 61339181. The next prime is 61339249. The reversal of 61339240 is 4293316.

It can be written as a sum of positive squares in 2 ways, for example, as 49928356 + 11410884 = 7066^2 + 3378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61339199 and 61339208.

It is not an unprimeable number, because it can be changed into a prime (61339249) 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, 766701 + ... + 766780.

Almost surely, 2^61339240 is an apocalyptic number.

It is an amenable number.

61339240 is an abundant number, since it is smaller than the sum of its proper divisors (76674140).

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

61339240 is a wasteful number, since it uses less digits than its factorization.

61339240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533492 (or 1533488 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 61339240 is about 7831.9371805448. The cubic root of 61339240 is about 394.3781059427.

The spelling of 61339240 in words is "sixty-one million, three hundred thirty-nine thousand, two hundred forty".