16400730 has 16 divisors (see below), whose sum is σ = 39361824. Its totient is φ = 4373520.

The previous prime is 16400723. The next prime is 16400737. The reversal of 16400730 is 3700461.

16400730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16400723) and next prime (16400737).

It is a junction number, because it is equal to n+sod(n) for n = 16400697 and 16400706.

It is not an unprimeable number, because it can be changed into a prime (16400737) 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, 273316 + ... + 273375.

It is an arithmetic number, because the mean of its divisors is an integer number (2460114).

Almost surely, 2^16400730 is an apocalyptic number.

16400730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16400730 is an abundant number, since it is smaller than the sum of its proper divisors (22961094).

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

16400730 is a wasteful number, since it uses less digits than its factorization.

16400730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546701.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 16400730 is about 4049.7814755861. The cubic root of 16400730 is about 254.0705881892.

The spelling of 16400730 in words is "sixteen million, four hundred thousand, seven hundred thirty".