14921840 has 40 divisors (see below), whose sum is σ = 36522960. Its totient is φ = 5654016.

The previous prime is 14921807. The next prime is 14921843. The reversal of 14921840 is 4812941.

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

It is a super-2 number, since 2×14921840² = 445322617971200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14921843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3389 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (913074).

Almost surely, 2^14921840 is an apocalyptic number.

14921840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14921840 is an abundant number, since it is smaller than the sum of its proper divisors (21601120).

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

14921840 is a wasteful number, since it uses less digits than its factorization.

14921840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9849 (or 9843 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 14921840 is about 3862.8797547943. The cubic root of 14921840 is about 246.1921076342.

The spelling of 14921840 in words is "fourteen million, nine hundred twenty-one thousand, eight hundred forty".