401202540 has 72 divisors (see below), whose sum is σ = 1234160928. Its totient is φ = 105477120.

The previous prime is 401202521. The next prime is 401202553. The reversal of 401202540 is 45202104.

401202540 is a `hidden beast` number, since 4 + 0 + 120 + 2 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 2917 + ... + 28476.

It is an arithmetic number, because the mean of its divisors is an integer number (17141124).

Almost surely, 2^401202540 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 401202540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617080464).

401202540 is an abundant number, since it is smaller than the sum of its proper divisors (832958388).

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

401202540 is a wasteful number, since it uses less digits than its factorization.

401202540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31479 (or 31474 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 401202540 is about 20030.0409385503. The cubic root of 401202540 is about 737.5439269057.

Adding to 401202540 its reverse (45202104), we get a palindrome (446404644).

The spelling of 401202540 in words is "four hundred one million, two hundred two thousand, five hundred forty".