16425720 has 128 divisors (see below), whose sum is σ = 55814400. Its totient is φ = 4295808.

The previous prime is 16425713. The next prime is 16425737. The reversal of 16425720 is 2752461.

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 31 ways as a sum of consecutive naturals, for example, 72247 + ... + 72473.

It is an arithmetic number, because the mean of its divisors is an integer number (436050).

Almost surely, 2^16425720 is an apocalyptic number.

16425720 is a gapful number since it is divisible by the number (10) 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 16425720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27907200).

16425720 is an abundant number, since it is smaller than the sum of its proper divisors (39388680).

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

16425720 is a wasteful number, since it uses less digits than its factorization.

16425720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 16425720 is about 4052.8656528437. The cubic root of 16425720 is about 254.1995662271.

The spelling of 16425720 in words is "sixteen million, four hundred twenty-five thousand, seven hundred twenty".