4991520 has 48 divisors (see below), whose sum is σ = 15724800. Its totient is φ = 1330944.

The previous prime is 4991507. The next prime is 4991543. The reversal of 4991520 is 251994.

It is a happy number.

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 (30).

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720 + ... + 5679.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^4991520 is an apocalyptic number.

4991520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4991520 is an abundant number, since it is smaller than the sum of its proper divisors (10733280).

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

4991520 is a wasteful number, since it uses less digits than its factorization.

4991520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10417 (or 10409 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 4991520 is about 2234.1709871897. The cubic root of 4991520 is about 170.9008693248.

The spelling of 4991520 in words is "four million, nine hundred ninety-one thousand, five hundred twenty".