401725720 has 32 divisors (see below), whose sum is σ = 986055120. Its totient is φ = 146081920.

The previous prime is 401725633. The next prime is 401725729. The reversal of 401725720 is 27527104.

It is a super-2 number, since 2×401725720² = 322767108219036800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401725729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456067 + ... + 456946.

Almost surely, 2^401725720 is an apocalyptic number.

401725720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401725720 is an abundant number, since it is smaller than the sum of its proper divisors (584329400).

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

401725720 is a wasteful number, since it uses less digits than its factorization.

401725720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913035 (or 913031 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 401725720 is about 20043.0965671475. The cubic root of 401725720 is about 737.8643806972.

The spelling of 401725720 in words is "four hundred one million, seven hundred twenty-five thousand, seven hundred twenty".