1930691628 has 18 divisors (see below), whose sum is σ = 4880359484. Its totient is φ = 643563864.

The previous prime is 1930691627. The next prime is 1930691647. The reversal of 1930691628 is 8261960391.

It is a happy number.

1930691628 is a `hidden beast` number, since 19 + 3 + 0 + 6 + 9 + 1 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1930691621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26815126 + ... + 26815197.

Almost surely, 2^1930691628 is an apocalyptic number.

1930691628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1930691628 is an abundant number, since it is smaller than the sum of its proper divisors (2949667856).

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

1930691628 is a wasteful number, since it uses less digits than its factorization.

1930691628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53630333 (or 53630328 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 1930691628 is about 43939.6361842016. The cubic root of 1930691628 is about 1245.1957731522.

The spelling of 1930691628 in words is "one billion, nine hundred thirty million, six hundred ninety-one thousand, six hundred twenty-eight".