401328739 has 4 divisors (see below), whose sum is σ = 458661424. Its totient is φ = 343996056.

The previous prime is 401328737. The next prime is 401328743. The reversal of 401328739 is 937823104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401328739 - 2¹ = 401328737 is a prime.

It is a super-2 number, since 2×401328739² = 322129513494660242, 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 = 401328698 and 401328707.

It is not an unprimeable number, because it can be changed into a prime (401328737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28666332 + ... + 28666345.

It is an arithmetic number, because the mean of its divisors is an integer number (114665356).

Almost surely, 2^401328739 is an apocalyptic number.

401328739 is a deficient number, since it is larger than the sum of its proper divisors (57332685).

401328739 is an equidigital number, since it uses as much as digits as its factorization.

401328739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57332684.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 401328739 is about 20033.1909340474. The cubic root of 401328739 is about 737.6212507337.

The spelling of 401328739 in words is "four hundred one million, three hundred twenty-eight thousand, seven hundred thirty-nine".