401031780 has 48 divisors (see below), whose sum is σ = 1124492544. Its totient is φ = 106789120.

The previous prime is 401031773. The next prime is 401031793. The reversal of 401031780 is 87130104.

It is a self number, because there is not a number n which added to its sum of digits gives 401031780.

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, 41269 + ... + 50051.

It is an arithmetic number, because the mean of its divisors is an integer number (23426928).

Almost surely, 2^401031780 is an apocalyptic number.

It is an amenable number.

401031780 is an abundant number, since it is smaller than the sum of its proper divisors (723460764).

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

401031780 is a wasteful number, since it uses less digits than its factorization.

401031780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9556 (or 9554 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 401031780 is about 20025.7778875129. Note that the first 3 decimals coincide. The cubic root of 401031780 is about 737.4392741343.

Adding to 401031780 its reverse (87130104), we get a palindrome (488161884).

The spelling of 401031780 in words is "four hundred one million, thirty-one thousand, seven hundred eighty".