801640190 has 32 divisors (see below), whose sum is σ = 1555678656. Its totient is φ = 295660800.

The previous prime is 801640181. The next prime is 801640199. The reversal of 801640190 is 91046108.

It is an interprime number because it is at equal distance from previous prime (801640181) and next prime (801640199).

It is a super-2 number, since 2×801640190² = 1285253988446472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801640199) 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, 135290 + ... + 141090.

It is an arithmetic number, because the mean of its divisors is an integer number (48614958).

Almost surely, 2^801640190 is an apocalyptic number.

801640190 is a deficient number, since it is larger than the sum of its proper divisors (754038466).

801640190 is a wasteful number, since it uses less digits than its factorization.

801640190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6884.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 801640190 is about 28313.2511379389. The cubic root of 801640190 is about 928.9517576082.

Adding to 801640190 its reverse (91046108), we get a palindrome (892686298).

The spelling of 801640190 in words is "eight hundred one million, six hundred forty thousand, one hundred ninety".