4921440 has 48 divisors (see below), whose sum is σ = 15504048. Its totient is φ = 1312256.

The previous prime is 4921429. The next prime is 4921447. The reversal of 4921440 is 441294.

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

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

It is a self number, because there is not a number n which added to its sum of digits gives 4921440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4921447) 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, 4647 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (323001).

Almost surely, 2^4921440 is an apocalyptic number.

4921440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4921440 is an abundant number, since it is smaller than the sum of its proper divisors (10582608).

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

4921440 is a wasteful number, since it uses less digits than its factorization.

4921440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10271 (or 10263 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4921440 is about 2218.4318786025. The cubic root of 4921440 is about 170.0972914833.

The spelling of 4921440 in words is "four million, nine hundred twenty-one thousand, four hundred forty".