19958028 has 12 divisors (see below), whose sum is σ = 46568760. Its totient is φ = 6652672.

The previous prime is 19958011. The next prime is 19958039. The reversal of 19958028 is 82085991.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831573 + ... + 831596.

It is an arithmetic number, because the mean of its divisors is an integer number (3880730).

Almost surely, 2^19958028 is an apocalyptic number.

It is an amenable number.

19958028 is an abundant number, since it is smaller than the sum of its proper divisors (26610732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19958028 is a wasteful number, since it uses less digits than its factorization.

19958028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663176 (or 1663174 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 19958028 is about 4467.4408781762. The cubic root of 19958028 is about 271.2517461149.

The spelling of 19958028 in words is "nineteen million, nine hundred fifty-eight thousand, twenty-eight".