10421784 has 56 divisors (see below), whose sum is σ = 29314260. Its totient is φ = 3471984.

The previous prime is 10421779. The next prime is 10421791. The reversal of 10421784 is 48712401.

It is a super-2 number, since 2×10421784² = 217227163485312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4939 + ... + 6725.

Almost surely, 2^10421784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10421784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14657130).

10421784 is an abundant number, since it is smaller than the sum of its proper divisors (18892476).

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

10421784 is an equidigital number, since it uses as much as digits as its factorization.

10421784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 10421784 is about 3228.2787983692. The cubic root of 10421784 is about 218.4308735487.

The spelling of 10421784 in words is "ten million, four hundred twenty-one thousand, seven hundred eighty-four".