400501982 has 8 divisors (see below), whose sum is σ = 601988016. Its totient is φ = 199839312.

The previous prime is 400501961. The next prime is 400502021. The reversal of 400501982 is 289105004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204623 + ... + 206570.

It is an arithmetic number, because the mean of its divisors is an integer number (75248502).

Almost surely, 2^400501982 is an apocalyptic number.

400501982 is a deficient number, since it is larger than the sum of its proper divisors (201486034).

400501982 is a wasteful number, since it uses less digits than its factorization.

400501982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411682.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 400501982 is about 20012.5456151885. The cubic root of 400501982 is about 737.1143904673.

Adding to 400501982 its reverse (289105004), we get a palindrome (689606986).

The spelling of 400501982 in words is "four hundred million, five hundred one thousand, nine hundred eighty-two".