427283028978 has 32 divisors (see below), whose sum is σ = 920479459200. Its totient is φ = 131446336896.

The previous prime is 427283028917. The next prime is 427283029003. The reversal of 427283028978 is 879820382724.

427283028978 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×427283028978² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119518 + ... + 932121.

It is an arithmetic number, because the mean of its divisors is an integer number (28764983100).

Almost surely, 2^427283028978 is an apocalyptic number.

427283028978 is an abundant number, since it is smaller than the sum of its proper divisors (493196430222).

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

427283028978 is a wasteful number, since it uses less digits than its factorization.

427283028978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056866.

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 427283028978 in words is "four hundred twenty-seven billion, two hundred eighty-three million, twenty-eight thousand, nine hundred seventy-eight".