16378506 has 12 divisors (see below), whose sum is σ = 35486802. Its totient is φ = 5459496.

The previous prime is 16378501. The next prime is 16378511. The reversal of 16378506 is 60587361.

It is an interprime number because it is at equal distance from previous prime (16378501) and next prime (16378511).

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 4372281 = 3465^2 + 2091^2 .

It is not an unprimeable number, because it can be changed into a prime (16378501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454941 + ... + 454976.

Almost surely, 2^16378506 is an apocalyptic number.

16378506 is an abundant number, since it is smaller than the sum of its proper divisors (19108296).

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

16378506 is a wasteful number, since it uses less digits than its factorization.

16378506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909925 (or 909922 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 16378506 is about 4047.0366936809. The cubic root of 16378506 is about 253.9557758788.

The spelling of 16378506 in words is "sixteen million, three hundred seventy-eight thousand, five hundred six".