4640280 has 32 divisors (see below), whose sum is σ = 13921200. Its totient is φ = 1237376.

The previous prime is 4640267. The next prime is 4640287. The reversal of 4640280 is 820464.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4640280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19215 + ... + 19454.

Almost surely, 2^4640280 is an apocalyptic number.

4640280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4640280 is an abundant number, since it is smaller than the sum of its proper divisors (9280920).

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

4640280 is a wasteful number, since it uses less digits than its factorization.

4640280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38683 (or 38679 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 4640280 is about 2154.1309152417. The cubic root of 4640280 is about 166.7943732323.

The spelling of 4640280 in words is "four million, six hundred forty thousand, two hundred eighty".