401523240 has 64 divisors (see below), whose sum is σ = 1206192960. Its totient is φ = 106928640.

The previous prime is 401523217. The next prime is 401523251. The reversal of 401523240 is 42325104.

It is a super-3 number, since 3×401523240³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 110655 + ... + 114225.

It is an arithmetic number, because the mean of its divisors is an integer number (18846765).

Almost surely, 2^401523240 is an apocalyptic number.

401523240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401523240 is an abundant number, since it is smaller than the sum of its proper divisors (804669720).

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

401523240 is a wasteful number, since it uses less digits than its factorization.

401523240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522 (or 4518 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 401523240 is about 20038.0448148017. The cubic root of 401523240 is about 737.7403923802.

Adding to 401523240 its reverse (42325104), we get a palindrome (443848344).

The spelling of 401523240 in words is "four hundred one million, five hundred twenty-three thousand, two hundred forty".