1640472 has 32 divisors (see below), whose sum is σ = 4244400. Its totient is φ = 527744.

The previous prime is 1640467. The next prime is 1640497. The reversal of 1640472 is 2740461.

It is a super-2 number, since 2×1640472² = 5382296765568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 483 + ... + 1874.

2^1640472 is an apocalyptic number.

1640472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640472 is an abundant number, since it is smaller than the sum of its proper divisors (2603928).

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

1640472 is a wasteful number, since it uses less digits than its factorization.

1640472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1640472 is about 1280.8091192680. The cubic root of 1640472 is about 117.9386830718.

It can be divided in two parts, 1640 and 472, that added together give a palindrome (2112).

The spelling of 1640472 in words is "one million, six hundred forty thousand, four hundred seventy-two".