401720737 has 8 divisors (see below), whose sum is σ = 457295040. Its totient is φ = 349322160.

The previous prime is 401720719. The next prime is 401720741. The reversal of 401720737 is 737027104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 401720737 - 2¹¹ = 401718689 is a prime.

It is a super-2 number, since 2×401720737² = 322759101071646338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401720699 and 401720708.

It is not an unprimeable number, because it can be changed into a prime (401720777) 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, 793662 + ... + 794167.

It is an arithmetic number, because the mean of its divisors is an integer number (57161880).

Almost surely, 2^401720737 is an apocalyptic number.

It is an amenable number.

401720737 is a deficient number, since it is larger than the sum of its proper divisors (55574303).

401720737 is a wasteful number, since it uses less digits than its factorization.

401720737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587863.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 401720737 is about 20042.9722596226. The cubic root of 401720737 is about 737.8613298649.

The spelling of 401720737 in words is "four hundred one million, seven hundred twenty thousand, seven hundred thirty-seven".