1917890352 has 80 divisors (see below), whose sum is σ = 6291502080. Its totient is φ = 547967808.

The previous prime is 1917890341. The next prime is 1917890389. The reversal of 1917890352 is 2530987191.

It is a junction number, because it is equal to n+sod(n) for n = 1917890298 and 1917890307.

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, 314088 + ... + 320135.

It is an arithmetic number, because the mean of its divisors is an integer number (78643776).

Almost surely, 2^1917890352 is an apocalyptic number.

1917890352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1917890352 is an abundant number, since it is smaller than the sum of its proper divisors (4373611728).

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

1917890352 is a wasteful number, since it uses less digits than its factorization.

1917890352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634247 (or 634235 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1917890352 is about 43793.7250299629. The cubic root of 1917890352 is about 1242.4376156320.

The spelling of 1917890352 in words is "one billion, nine hundred seventeen million, eight hundred ninety thousand, three hundred fifty-two".