56951978 has 8 divisors (see below), whose sum is σ = 85489668. Its totient is φ = 28455424.

The previous prime is 56951977. The next prime is 56952017. The reversal of 56951978 is 87915965.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56055169 + 896809 = 7487^2 + 947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×56951978² = 6487055596224968, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56951977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6551 + ... + 12522.

Almost surely, 2^56951978 is an apocalyptic number.

56951978 is a deficient number, since it is larger than the sum of its proper divisors (28537690).

56951978 is a wasteful number, since it uses less digits than its factorization.

56951978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20568.

The product of its digits is 680400, while the sum is 50.

The square root of 56951978 is about 7546.6534304949. The cubic root of 56951978 is about 384.7420051472.

The spelling of 56951978 in words is "fifty-six million, nine hundred fifty-one thousand, nine hundred seventy-eight".