61974840 has 32 divisors (see below), whose sum is σ = 185924880. Its totient is φ = 16526592.

The previous prime is 61974817. The next prime is 61974853. The reversal of 61974840 is 4847916.

It is a happy number.

61974840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 258109 + ... + 258348.

Almost surely, 2^61974840 is an apocalyptic number.

61974840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61974840 is an abundant number, since it is smaller than the sum of its proper divisors (123950040).

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

61974840 is a wasteful number, since it uses less digits than its factorization.

61974840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516471 (or 516467 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 61974840 is about 7872.4100502959. The cubic root of 61974840 is about 395.7356157927.

The spelling of 61974840 in words is "sixty-one million, nine hundred seventy-four thousand, eight hundred forty".