16400264 has 8 divisors (see below), whose sum is σ = 30750510. Its totient is φ = 8200128.

The previous prime is 16400233. The next prime is 16400269. The reversal of 16400264 is 46200461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 62500 = 4042^2 + 250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16400269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025009 + ... + 1025024.

Almost surely, 2^16400264 is an apocalyptic number.

It is an amenable number.

16400264 is a deficient number, since it is larger than the sum of its proper divisors (14350246).

16400264 is a wasteful number, since it uses less digits than its factorization.

16400264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050039 (or 2050035 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 16400264 is about 4049.7239412088. The cubic root of 16400264 is about 254.0681818325.

The spelling of 16400264 in words is "sixteen million, four hundred thousand, two hundred sixty-four".