1646472140 has 24 divisors (see below), whose sum is σ = 3477584880. Its totient is φ = 654780608.

The previous prime is 1646472133. The next prime is 1646472161. The reversal of 1646472140 is 412746461.

It is a self number, because there is not a number n which added to its sum of digits gives 1646472140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234470 + ... + 241389.

It is an arithmetic number, because the mean of its divisors is an integer number (144899370).

Almost surely, 2^1646472140 is an apocalyptic number.

1646472140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646472140 is an abundant number, since it is smaller than the sum of its proper divisors (1831112740).

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

1646472140 is a wasteful number, since it uses less digits than its factorization.

1646472140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476041 (or 476039 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 1646472140 is about 40576.7438319045. The cubic root of 1646472140 is about 1180.8229775516.

The spelling of 1646472140 in words is "one billion, six hundred forty-six million, four hundred seventy-two thousand, one hundred forty".