1928534397 has 16 divisors (see below), whose sum is σ = 2663012352. Its totient is φ = 1240144560.

The previous prime is 1928534393. The next prime is 1928534407. The reversal of 1928534397 is 7934358291.

It is not a de Polignac number, because 1928534397 - 2² = 1928534393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928534393) 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 15 ways as a sum of consecutive naturals, for example, 5223 + ... + 62324.

It is an arithmetic number, because the mean of its divisors is an integer number (166438272).

Almost surely, 2^1928534397 is an apocalyptic number.

It is an amenable number.

1928534397 is a deficient number, since it is larger than the sum of its proper divisors (734477955).

1928534397 is a wasteful number, since it uses less digits than its factorization.

1928534397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67888.

The product of its digits is 1632960, while the sum is 51.

The square root of 1928534397 is about 43915.0816576720. The cubic root of 1928534397 is about 1244.7318330182.

The spelling of 1928534397 in words is "one billion, nine hundred twenty-eight million, five hundred thirty-four thousand, three hundred ninety-seven".