1640914272 has 36 divisors (see below), whose sum is σ = 4666350780. Its totient is φ = 546971328.

The previous prime is 1640914267. The next prime is 1640914333. The reversal of 1640914272 is 2724190461.

It is a happy number.

1640914272 is a `hidden beast` number, since 1 + 640 + 9 + 1 + 4 + 2 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2848522 + ... + 2849097.

It is an arithmetic number, because the mean of its divisors is an integer number (129620855).

Almost surely, 2^1640914272 is an apocalyptic number.

1640914272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640914272 is an abundant number, since it is smaller than the sum of its proper divisors (3025436508).

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

1640914272 is a wasteful number, since it uses less digits than its factorization.

1640914272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697635 (or 5697624 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1640914272 is about 40508.2000587535. The cubic root of 1640914272 is about 1179.4928089369.

The spelling of 1640914272 in words is "one billion, six hundred forty million, nine hundred fourteen thousand, two hundred seventy-two".