401427765 has 16 divisors (see below), whose sum is σ = 713649600. Its totient is φ = 214094736.

The previous prime is 401427751. The next prime is 401427781. The reversal of 401427765 is 567724104.

It is not a de Polignac number, because 401427765 - 2²⁴ = 384650549 is a prime.

It is a super-2 number, since 2×401427765² = 322288501025790450, which contains 22 as substring.

It is a congruent number.

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, 1486635 + ... + 1486904.

It is an arithmetic number, because the mean of its divisors is an integer number (44603100).

Almost surely, 2^401427765 is an apocalyptic number.

401427765 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401427765 is a deficient number, since it is larger than the sum of its proper divisors (312221835).

401427765 is a wasteful number, since it uses less digits than its factorization.

401427765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973553 (or 2973547 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 401427765 is about 20035.6623299556. The cubic root of 401427765 is about 737.6819139490.

The spelling of 401427765 in words is "four hundred one million, four hundred twenty-seven thousand, seven hundred sixty-five".