401544340 has 12 divisors (see below), whose sum is σ = 843243156. Its totient is φ = 160617728.

The previous prime is 401544331. The next prime is 401544343. The reversal of 401544340 is 43445104.

It can be written as a sum of positive squares in 2 ways, for example, as 136375684 + 265168656 = 11678^2 + 16284^2 .

It is a super-2 number, since 2×401544340² = 322475713972071200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401544343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10038589 + ... + 10038628.

It is an arithmetic number, because the mean of its divisors is an integer number (70270263).

Almost surely, 2^401544340 is an apocalyptic number.

It is an amenable number.

401544340 is an abundant number, since it is smaller than the sum of its proper divisors (441698816).

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

401544340 is a wasteful number, since it uses less digits than its factorization.

401544340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20077226 (or 20077224 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 401544340 is about 20038.5713063581. The cubic root of 401544340 is about 737.7533148780.

Adding to 401544340 its reverse (43445104), we get a palindrome (444989444).

The spelling of 401544340 in words is "four hundred one million, five hundred forty-four thousand, three hundred forty".