401200540 has 48 divisors (see below), whose sum is σ = 908812800. Its totient is φ = 147893760.

The previous prime is 401200537. The next prime is 401200559. The reversal of 401200540 is 45002104.

401200540 = T₂₉₆ + T₂₉₇ + ... + T₁₃₄₄.

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, 272005 + ... + 273475.

It is an arithmetic number, because the mean of its divisors is an integer number (18933600).

Almost surely, 2^401200540 is an apocalyptic number.

It is an amenable number.

401200540 is an abundant number, since it is smaller than the sum of its proper divisors (507612260).

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

401200540 is a wasteful number, since it uses less digits than its factorization.

401200540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542 (or 2540 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 401200540 is about 20029.9910134778. The cubic root of 401200540 is about 737.5427013483.

Adding to 401200540 its reverse (45002104), we get a palindrome (446202644).

The spelling of 401200540 in words is "four hundred one million, two hundred thousand, five hundred forty".