401366340 has 120 divisors (see below), whose sum is σ = 1271211480. Its totient is φ = 106002432.

The previous prime is 401366299. The next prime is 401366347. The reversal of 401366340 is 43663104.

It can be written as a sum of positive squares in 4 ways, for example, as 145878084 + 255488256 = 12078^2 + 15984^2 .

It is a super-2 number, since 2×401366340² = 322189877769991200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (401366347) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 175444 + ... + 177716.

It is an arithmetic number, because the mean of its divisors is an integer number (10593429).

Almost surely, 2^401366340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401366340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635605740).

401366340 is an abundant number, since it is smaller than the sum of its proper divisors (869845140).

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

401366340 is a wasteful number, since it uses less digits than its factorization.

401366340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403 (or 2392 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 401366340 is about 20034.1293796361. The cubic root of 401366340 is about 737.6442862387.

Subtracting from 401366340 its product of nonzero digits (5184), we obtain a square (401361156 = 20034²).

The spelling of 401366340 in words is "four hundred one million, three hundred sixty-six thousand, three hundred forty".