401554240 has 56 divisors (see below), whose sum is σ = 997793280. Its totient is φ = 153635328.

The previous prime is 401554211. The next prime is 401554243. The reversal of 401554240 is 42455104.

It is a happy number.

It is a super-2 number, since 2×401554240² = 322491615323955200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401554243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19920 + ... + 34639.

Almost surely, 2^401554240 is an apocalyptic number.

401554240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401554240 is an abundant number, since it is smaller than the sum of its proper divisors (596239040).

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

401554240 is a wasteful number, since it uses less digits than its factorization.

401554240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54599 (or 54589 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 401554240 is about 20038.8183284344. The cubic root of 401554240 is about 737.7593778845.

The spelling of 401554240 in words is "four hundred one million, five hundred fifty-four thousand, two hundred forty".