1640030 has 24 divisors (see below), whose sum is σ = 3435048. Its totient is φ = 562128.

The previous prime is 1640021. The next prime is 1640033. The reversal of 1640030 is 300461.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1639987 and 1640014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1184 + ... + 2163.

It is an arithmetic number, because the mean of its divisors is an integer number (143127).

2^1640030 is an apocalyptic number.

1640030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640030 is an abundant number, since it is smaller than the sum of its proper divisors (1795018).

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

1640030 is a wasteful number, since it uses less digits than its factorization.

1640030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 3361 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1640030 is about 1280.6365604651. The cubic root of 1640030 is about 117.9280898644.

Adding to 1640030 its reverse (300461), we get a palindrome (1940491).

The spelling of 1640030 in words is "one million, six hundred forty thousand, thirty".