4721904 has 90 divisors (see below), whose sum is σ = 14578928. Its totient is φ = 1425600.

The previous prime is 4721897. The next prime is 4721911. The reversal of 4721904 is 4091274.

It is a happy number.

4721904 is a `hidden beast` number, since 472 + 190 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (4721897) and next prime (4721911).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17289 + ... + 17559.

Almost surely, 2^4721904 is an apocalyptic number.

4721904 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4721904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7289464).

4721904 is an abundant number, since it is smaller than the sum of its proper divisors (9857024).

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

4721904 is a wasteful number, since it uses less digits than its factorization.

4721904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 4721904 is about 2172.9942475764. The cubic root of 4721904 is about 167.7666829238.

It can be divided in two parts, 4721 and 904, that added together give a square (5625 = 75²).

The spelling of 4721904 in words is "four million, seven hundred twenty-one thousand, nine hundred four".