401982775 has 36 divisors (see below), whose sum is σ = 528950520. Its totient is φ = 302680000.

The previous prime is 401982769. The next prime is 401982803. The reversal of 401982775 is 577289104.

It is not a de Polignac number, because 401982775 - 2¹⁵ = 401950007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1601400 + ... + 1601650.

It is an arithmetic number, because the mean of its divisors is an integer number (14693070).

Almost surely, 2^401982775 is an apocalyptic number.

401982775 is a deficient number, since it is larger than the sum of its proper divisors (126967745).

401982775 is a wasteful number, since it uses less digits than its factorization.

401982775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 401982775 is about 20049.5080987041. The cubic root of 401982775 is about 738.0217279267.

The spelling of 401982775 in words is "four hundred one million, nine hundred eighty-two thousand, seven hundred seventy-five".