401990547 has 64 divisors (see below), whose sum is σ = 663552000. Its totient is φ = 211559040.

The previous prime is 401990513. The next prime is 401990579. The reversal of 401990547 is 745099104.

It is not a de Polignac number, because 401990547 - 2¹⁵ = 401957779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (401990507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2019954 + ... + 2020152.

It is an arithmetic number, because the mean of its divisors is an integer number (10368000).

Almost surely, 2^401990547 is an apocalyptic number.

401990547 is a deficient number, since it is larger than the sum of its proper divisors (261561453).

401990547 is a wasteful number, since it uses less digits than its factorization.

401990547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 401990547 is about 20049.7019179837. The cubic root of 401990547 is about 738.0264842399.

It can be divided in two parts, 40199054 and 7, that added together give a triangular number (40199061 = T₈₉₆₆).

The spelling of 401990547 in words is "four hundred one million, nine hundred ninety thousand, five hundred forty-seven".