1906874658 has 72 divisors (see below), whose sum is σ = 4583238660. Its totient is φ = 572382720.

The previous prime is 1906874657. The next prime is 1906874677. The reversal of 1906874658 is 8564786091.

It can be written as a sum of positive squares in 6 ways, for example, as 58476609 + 1848398049 = 7647^2 + 42993^2 .

It is a super-2 number, since 2×1906874658² = 7272341922645233928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1906874657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117078 + ... + 132366.

Almost surely, 2^1906874658 is an apocalyptic number.

1906874658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906874658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2291619330).

1906874658 is an abundant number, since it is smaller than the sum of its proper divisors (2676364002).

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

1906874658 is a wasteful number, since it uses less digits than its factorization.

1906874658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15364 (or 15348 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 1906874658 is about 43667.7759680980. The cubic root of 1906874658 is about 1240.0543372824.

The spelling of 1906874658 in words is "one billion, nine hundred six million, eight hundred seventy-four thousand, six hundred fifty-eight".