401024240 has 20 divisors (see below), whose sum is σ = 932381544. Its totient is φ = 160409664.

The previous prime is 401024233. The next prime is 401024263. The reversal of 401024240 is 42420104.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2506322 + ... + 2506481.

Almost surely, 2^401024240 is an apocalyptic number.

401024240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401024240 is an abundant number, since it is smaller than the sum of its proper divisors (531357304).

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

401024240 is a wasteful number, since it uses less digits than its factorization.

401024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012816 (or 5012810 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 401024240 is about 20025.5896292718. The cubic root of 401024240 is about 737.4346524499.

Adding to 401024240 its reverse (42420104), we get a palindrome (443444344).

The spelling of 401024240 in words is "four hundred one million, twenty-four thousand, two hundred forty".