42400886978 has 8 divisors (see below), whose sum is σ = 63602207760. Its totient is φ = 21200151060.

The previous prime is 42400886971. The next prime is 42400886999. The reversal of 42400886978 is 87968800424.

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

It is a super-2 number, since 2×42400886978² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42400886971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185933 + ... + 345503.

It is an arithmetic number, because the mean of its divisors is an integer number (7950275970).

Almost surely, 2^42400886978 is an apocalyptic number.

42400886978 is a deficient number, since it is larger than the sum of its proper divisors (21201320782).

42400886978 is a wasteful number, since it uses less digits than its factorization.

42400886978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292432.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 42400886978 in words is "forty-two billion, four hundred million, eight hundred eighty-six thousand, nine hundred seventy-eight".