1640162892 has 12 divisors (see below), whose sum is σ = 3827046776. Its totient is φ = 546720960.

The previous prime is 1640162891. The next prime is 1640162903. The reversal of 1640162892 is 2982610461.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1640162892.

It is not an unprimeable number, because it can be changed into a prime (1640162891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68340109 + ... + 68340132.

Almost surely, 2^1640162892 is an apocalyptic number.

1640162892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640162892 is an abundant number, since it is smaller than the sum of its proper divisors (2186883884).

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

1640162892 is a wasteful number, since it uses less digits than its factorization.

1640162892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136680248 (or 136680246 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1640162892 is about 40498.9245783144. The cubic root of 1640162892 is about 1179.3127502488.

The spelling of 1640162892 in words is "one billion, six hundred forty million, one hundred sixty-two thousand, eight hundred ninety-two".