1640090232 has 192 divisors, whose sum is σ = 5166776160. Its totient is φ = 464486400.

The previous prime is 1640090213. The next prime is 1640090267. The reversal of 1640090232 is 2320900461.

It is a junction number, because it is equal to n+sod(n) for n = 1640090196 and 1640090205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2436648 + ... + 2437320.

Almost surely, 2^1640090232 is an apocalyptic number.

1640090232 is a gapful number since it is divisible by the number (12) 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 1640090232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2583388080).

1640090232 is an abundant number, since it is smaller than the sum of its proper divisors (3526685928).

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

1640090232 is a wasteful number, since it uses less digits than its factorization.

1640090232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1640090232 is about 40498.0275075219. The cubic root of 1640090232 is about 1179.2953352855.

Adding to 1640090232 its reverse (2320900461), we get a palindrome (3960990693).

The spelling of 1640090232 in words is "one billion, six hundred forty million, ninety thousand, two hundred thirty-two".