401828731 has 4 divisors (see below), whose sum is σ = 402262200. Its totient is φ = 401395264.

The previous prime is 401828729. The next prime is 401828737. The reversal of 401828731 is 137828104.

It is a happy number.

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 401828731 - 2¹ = 401828729 is a prime.

It is a super-2 number, since 2×401828731² = 322932658114140722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401828737) 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, 215341 + ... + 217198.

It is an arithmetic number, because the mean of its divisors is an integer number (100565550).

Almost surely, 2^401828731 is an apocalyptic number.

401828731 is a deficient number, since it is larger than the sum of its proper divisors (433469).

401828731 is an equidigital number, since it uses as much as digits as its factorization.

401828731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433468.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 401828731 is about 20045.6661400912. Note that the first 3 decimals coincide. The cubic root of 401828731 is about 737.9274433360.

The spelling of 401828731 in words is "four hundred one million, eight hundred twenty-eight thousand, seven hundred thirty-one".