61764940 has 24 divisors (see below), whose sum is σ = 131835312. Its totient is φ = 24300480.

The previous prime is 61764929. The next prime is 61764947. The reversal of 61764940 is 4946716.

It is a self number, because there is not a number n which added to its sum of digits gives 61764940.

It is not an unprimeable number, because it can be changed into a prime (61764947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24094 + ... + 26533.

It is an arithmetic number, because the mean of its divisors is an integer number (5493138).

Almost surely, 2^61764940 is an apocalyptic number.

It is an amenable number.

61764940 is an abundant number, since it is smaller than the sum of its proper divisors (70070372).

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

61764940 is a wasteful number, since it uses less digits than its factorization.

61764940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50697 (or 50695 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 61764940 is about 7859.0673746953. The cubic root of 61764940 is about 395.2883436473.

The spelling of 61764940 in words is "sixty-one million, seven hundred sixty-four thousand, nine hundred forty".