401949100 has 72 divisors (see below), whose sum is σ = 1029045248. Its totient is φ = 133358400.

The previous prime is 401949089. The next prime is 401949103. The reversal of 401949100 is 1949104.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (401949103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12439 + ... + 30961.

Almost surely, 2^401949100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401949100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514522624).

401949100 is an abundant number, since it is smaller than the sum of its proper divisors (627096148).

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

401949100 is a wasteful number, since it uses less digits than its factorization.

401949100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18575 (or 18568 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 401949100 is about 20048.6682849510. The cubic root of 401949100 is about 738.0011187719.

It can be divided in two parts, 40194 and 9100, that added together give a palindrome (49294).

The spelling of 401949100 in words is "four hundred one million, nine hundred forty-nine thousand, one hundred".