190662640 has 160 divisors (see below), whose sum is σ = 537394176. Its totient is φ = 61501440.

The previous prime is 190662631. The next prime is 190662673. The reversal of 190662640 is 46266091.

It is a junction number, because it is equal to n+sod(n) for n = 190662596 and 190662605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1455375 + ... + 1455505.

Almost surely, 2^190662640 is an apocalyptic number.

190662640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 190662640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268697088).

190662640 is an abundant number, since it is smaller than the sum of its proper divisors (346731536).

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

190662640 is a wasteful number, since it uses less digits than its factorization.

190662640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 190662640 is about 13808.0643103948. The cubic root of 190662640 is about 575.5572568657.

It can be divided in two parts, 1906 and 62640, that added together give a palindrome (64546).

The spelling of 190662640 in words is "one hundred ninety million, six hundred sixty-two thousand, six hundred forty".