401024288978 has 4 divisors (see below), whose sum is σ = 601536433470. Its totient is φ = 200512144488.

The previous prime is 401024288947. The next prime is 401024288999. The reversal of 401024288978 is 879882420104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 309043710889 + 91980578089 = 555917^2 + 303283^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100256072243 + ... + 100256072246.

Almost surely, 2^401024288978 is an apocalyptic number.

401024288978 is a deficient number, since it is larger than the sum of its proper divisors (200512144492).

401024288978 is a wasteful number, since it uses less digits than its factorization.

401024288978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200512144491.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 401024288978 in words is "four hundred one billion, twenty-four million, two hundred eighty-eight thousand, nine hundred seventy-eight".