1890929685 has 16 divisors (see below), whose sum is σ = 3184724160. Its totient is φ = 955416960.

The previous prime is 1890929681. The next prime is 1890929741. The reversal of 1890929685 is 5869290981.

It is not a de Polignac number, because 1890929685 - 2² = 1890929681 is a prime.

It is a super-2 number, since 2×1890929685² = 7151230147228398450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890929681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3317136 + ... + 3317705.

It is an arithmetic number, because the mean of its divisors is an integer number (199045260).

Almost surely, 2^1890929685 is an apocalyptic number.

1890929685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1890929685 is a deficient number, since it is larger than the sum of its proper divisors (1293794475).

1890929685 is a wasteful number, since it uses less digits than its factorization.

1890929685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6634868.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The square root of 1890929685 is about 43484.8213173286. The cubic root of 1890929685 is about 1236.5882814273.

The spelling of 1890929685 in words is "one billion, eight hundred ninety million, nine hundred twenty-nine thousand, six hundred eighty-five".