2447904 has 48 divisors (see below), whose sum is σ = 6586272. Its totient is φ = 795648.

The previous prime is 2447897. The next prime is 2447917. The reversal of 2447904 is 4097442.

It is a tau number, because it is divible by the number of its divisors (48).

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, 3832 + ... + 4424.

It is an arithmetic number, because the mean of its divisors is an integer number (137214).

2^2447904 is an apocalyptic number.

2447904 is a gapful number since it is divisible by the number (24) 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 2447904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3293136).

2447904 is an abundant number, since it is smaller than the sum of its proper divisors (4138368).

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

2447904 is a wasteful number, since it uses less digits than its factorization.

2447904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 2447904 is about 1564.5778983483. The cubic root of 2447904 is about 134.7715202508.

The spelling of 2447904 in words is "two million, four hundred forty-seven thousand, nine hundred four".