401861250 has 270 divisors, whose sum is σ = 1314275391. Its totient is φ = 91854000.

The previous prime is 401861227. The next prime is 401861261. The reversal of 401861250 is 52168104.

401861250 is a `hidden beast` number, since 40 + 1 + 8 + 612 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 92910321 + 308950929 = 9639^2 + 17577^2 .

It is a tau number, because it is divible by the number of its divisors (270).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14175.

It is a super-2 number, since 2×401861250² = 322984928503125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 57408747 + ... + 57408753.

Almost surely, 2^401861250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401861250

401861250 is an abundant number, since it is smaller than the sum of its proper divisors (912414141).

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

401861250 is an frugal number, since it uses more digits than its factorization.

401861250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 401861250 is about 20046.4772466386. The cubic root of 401861250 is about 737.9473490100.

The spelling of 401861250 in words is "four hundred one million, eight hundred sixty-one thousand, two hundred fifty".