16402740 has 48 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 4345216.

The previous prime is 16402733. The next prime is 16402753. The reversal of 16402740 is 4720461.

16402740 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16402740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9202 + ... + 10838.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^16402740 is an apocalyptic number.

16402740 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 16402740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23115456).

16402740 is an abundant number, since it is smaller than the sum of its proper divisors (29828172).

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

16402740 is a wasteful number, since it uses less digits than its factorization.

16402740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816 (or 1814 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 16402740 is about 4050.0296295212. The cubic root of 16402740 is about 254.0809670162.

The spelling of 16402740 in words is "sixteen million, four hundred two thousand, seven hundred forty".