401780268 has 36 divisors (see below), whose sum is σ = 1050635040. Its totient is φ = 129308256.

The previous prime is 401780231. The next prime is 401780293. The reversal of 401780268 is 862087104.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×401780268² = 322854767508303648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 191380 + ... + 193467.

Almost surely, 2^401780268 is an apocalyptic number.

It is an amenable number.

401780268 is an abundant number, since it is smaller than the sum of its proper divisors (648854772).

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

401780268 is a wasteful number, since it uses less digits than its factorization.

401780268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384886 (or 384881 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 401780268 is about 20044.4572887370. The cubic root of 401780268 is about 737.8977759572.

The spelling of 401780268 in words is "four hundred one million, seven hundred eighty thousand, two hundred sixty-eight".