4639920 has 40 divisors (see below), whose sum is σ = 14384496. Its totient is φ = 1237248.

The previous prime is 4639909. The next prime is 4639927. The reversal of 4639920 is 299364.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (4639927) 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, 9427 + ... + 9906.

Almost surely, 2^4639920 is an apocalyptic number.

4639920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4639920 is an abundant number, since it is smaller than the sum of its proper divisors (9744576).

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

4639920 is a wasteful number, since it uses less digits than its factorization.

4639920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19349 (or 19343 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 4639920 is about 2154.0473532399. The cubic root of 4639920 is about 166.7900597335.

The spelling of 4639920 in words is "four million, six hundred thirty-nine thousand, nine hundred twenty".