400343541 has 24 divisors (see below), whose sum is σ = 581372064. Its totient is φ = 243601920.

The previous prime is 400343539. The next prime is 400343551. The reversal of 400343541 is 145343004.

It is not a de Polignac number, because 400343541 - 2¹ = 400343539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400343501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366406 + ... + 367496.

It is an arithmetic number, because the mean of its divisors is an integer number (24223836).

Almost surely, 2^400343541 is an apocalyptic number.

It is an amenable number.

400343541 is a deficient number, since it is larger than the sum of its proper divisors (181028523).

400343541 is a wasteful number, since it uses less digits than its factorization.

400343541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 400343541 is about 20008.5866817224. The cubic root of 400343541 is about 737.0171753468.

Adding to 400343541 its reverse (145343004), we get a palindrome (545686545).

The spelling of 400343541 in words is "four hundred million, three hundred forty-three thousand, five hundred forty-one".