190066640 has 20 divisors (see below), whose sum is σ = 441905124. Its totient is φ = 76026624.

The previous prime is 190066631. The next prime is 190066651. The reversal of 190066640 is 46660091.

190066640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 107910544 + 82156096 = 10388^2 + 9064^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×190066640² = 72250655281779200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190066597 and 190066606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187837 + ... + 1187996.

Almost surely, 2^190066640 is an apocalyptic number.

190066640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190066640 is an abundant number, since it is smaller than the sum of its proper divisors (251838484).

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

190066640 is a wasteful number, since it uses less digits than its factorization.

190066640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375846 (or 2375840 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 190066640 is about 13786.4658270349. The cubic root of 190066640 is about 574.9569117050.

The spelling of 190066640 in words is "one hundred ninety million, sixty-six thousand, six hundred forty".