509421958 has 16 divisors (see below), whose sum is σ = 804960000. Its totient is φ = 241122312.

The previous prime is 509421937. The next prime is 509421973. The reversal of 509421958 is 859124905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54943 + ... + 63541.

It is an arithmetic number, because the mean of its divisors is an integer number (50310000).

Almost surely, 2^509421958 is an apocalyptic number.

509421958 is a deficient number, since it is larger than the sum of its proper divisors (295538042).

509421958 is a wasteful number, since it uses less digits than its factorization.

509421958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10179.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 509421958 is about 22570.3778878423. The cubic root of 509421958 is about 798.6550098106.

It can be divided in two parts, 50942 and 1958, that added together give a square (52900 = 230²).

The spelling of 509421958 in words is "five hundred nine million, four hundred twenty-one thousand, nine hundred fifty-eight".