190354640 has 80 divisors (see below), whose sum is σ = 519526272. Its totient is φ = 63493632.

The previous prime is 190354639. The next prime is 190354649. The reversal of 190354640 is 46453091.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×190354640³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190354597 and 190354606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190354649) 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, 16127 + ... + 25313.

Almost surely, 2^190354640 is an apocalyptic number.

190354640 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 190354640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259763136).

190354640 is an abundant number, since it is smaller than the sum of its proper divisors (329171632).

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

190354640 is a wasteful number, since it uses less digits than its factorization.

190354640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244 (or 9238 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 190354640 is about 13796.9068997366. The cubic root of 190354640 is about 575.2471678400.

The spelling of 190354640 in words is "one hundred ninety million, three hundred fifty-four thousand, six hundred forty".