401665270 has 32 divisors (see below), whose sum is σ = 740570688. Its totient is φ = 156793728.

The previous prime is 401665241. The next prime is 401665291. The reversal of 401665270 is 72566104.

It is a happy number.

It is a super-2 number, since 2×401665270² = 322669978248345800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102487 + ... + 106333.

It is an arithmetic number, because the mean of its divisors is an integer number (23142834).

Almost surely, 2^401665270 is an apocalyptic number.

401665270 is a deficient number, since it is larger than the sum of its proper divisors (338905418).

401665270 is a wasteful number, since it uses less digits than its factorization.

401665270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 401665270 is about 20041.5885098961. The cubic root of 401665270 is about 737.8273685958.

The spelling of 401665270 in words is "four hundred one million, six hundred sixty-five thousand, two hundred seventy".