401242490 has 32 divisors (see below), whose sum is σ = 788719680. Its totient is φ = 145753600.

The previous prime is 401242487. The next prime is 401242573. The reversal of 401242490 is 94242104.

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 15 ways as a sum of consecutive naturals, for example, 206825 + ... + 208755.

It is an arithmetic number, because the mean of its divisors is an integer number (24647490).

Almost surely, 2^401242490 is an apocalyptic number.

401242490 is a deficient number, since it is larger than the sum of its proper divisors (387477190).

401242490 is a wasteful number, since it uses less digits than its factorization.

401242490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 401242490 is about 20031.0381658066. The cubic root of 401242490 is about 737.5684065629.

Adding to 401242490 its reverse (94242104), we get a palindrome (495484594).

The spelling of 401242490 in words is "four hundred one million, two hundred forty-two thousand, four hundred ninety".