1913961630 has 32 divisors (see below), whose sum is σ = 5249723904. Its totient is φ = 437476896.

The previous prime is 1913961613. The next prime is 1913961649. The reversal of 1913961630 is 361693191.

1913961630 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1913961630² = 7326498242224513800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4556842 + ... + 4557261.

It is an arithmetic number, because the mean of its divisors is an integer number (164053872).

Almost surely, 2^1913961630 is an apocalyptic number.

1913961630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1913961630 is an abundant number, since it is smaller than the sum of its proper divisors (3335762274).

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

1913961630 is a wasteful number, since it uses less digits than its factorization.

1913961630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9114120.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 1913961630 is about 43748.8471848116. The cubic root of 1913961630 is about 1241.5886743699.

The spelling of 1913961630 in words is "one billion, nine hundred thirteen million, nine hundred sixty-one thousand, six hundred thirty".