1640017272 has 16 divisors (see below), whose sum is σ = 4100043240. Its totient is φ = 546672416.

The previous prime is 1640017271. The next prime is 1640017303. The reversal of 1640017272 is 2727100461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640017271) 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, 34167003 + ... + 34167050.

Almost surely, 2^1640017272 is an apocalyptic number.

1640017272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640017272 is an abundant number, since it is smaller than the sum of its proper divisors (2460025968).

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

1640017272 is a wasteful number, since it uses less digits than its factorization.

1640017272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68334062 (or 68334058 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1640017272 is about 40497.1267128916. The cubic root of 1640017272 is about 1179.2778479014.

The spelling of 1640017272 in words is "one billion, six hundred forty million, seventeen thousand, two hundred seventy-two".