1639472 has 20 divisors (see below), whose sum is σ = 3344280. Its totient is φ = 776448.

The previous prime is 1639471. The next prime is 1639481. The reversal of 1639472 is 2749361.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1639471) 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, 2393 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (167214).

2^1639472 is an apocalyptic number.

It is an amenable number.

1639472 is an abundant number, since it is smaller than the sum of its proper divisors (1704808).

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

1639472 is a wasteful number, since it uses less digits than its factorization.

1639472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420 (or 5414 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 1639472 is about 1280.4186815257. The cubic root of 1639472 is about 117.9147138207.

The spelling of 1639472 in words is "one million, six hundred thirty-nine thousand, four hundred seventy-two".