61969240 has 32 divisors (see below), whose sum is σ = 139788000. Its totient is φ = 24724224.

The previous prime is 61969231. The next prime is 61969253. The reversal of 61969240 is 4296916.

61969240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61969240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15796 + ... + 19324.

It is an arithmetic number, because the mean of its divisors is an integer number (4368375).

Almost surely, 2^61969240 is an apocalyptic number.

It is an amenable number.

61969240 is an abundant number, since it is smaller than the sum of its proper divisors (77818760).

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

61969240 is a wasteful number, since it uses less digits than its factorization.

61969240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 61969240 is about 7872.0543697309. The cubic root of 61969240 is about 395.7236959760.

The spelling of 61969240 in words is "sixty-one million, nine hundred sixty-nine thousand, two hundred forty".