16400934 has 32 divisors (see below), whose sum is σ = 39761280. Its totient is φ = 4969800.

The previous prime is 16400927. The next prime is 16400939. The reversal of 16400934 is 43900461.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16400898 and 16400907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13212 + ... + 14399.

It is an arithmetic number, because the mean of its divisors is an integer number (1242540).

Almost surely, 2^16400934 is an apocalyptic number.

16400934 is an abundant number, since it is smaller than the sum of its proper divisors (23360346).

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

16400934 is a wasteful number, since it uses less digits than its factorization.

16400934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27633 (or 27627 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16400934 is about 4049.8066620519. The cubic root of 16400934 is about 254.0716416013.

The spelling of 16400934 in words is "sixteen million, four hundred thousand, nine hundred thirty-four".