16402426 has 4 divisors (see below), whose sum is σ = 24603642. Its totient is φ = 8201212.

The previous prime is 16402423. The next prime is 16402439. The reversal of 16402426 is 62420461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 40401 = 4045^2 + 201^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16402426.

It is not an unprimeable number, because it can be changed into a prime (16402423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4100605 + ... + 4100608.

Almost surely, 2^16402426 is an apocalyptic number.

16402426 is a deficient number, since it is larger than the sum of its proper divisors (8201216).

16402426 is an equidigital number, since it uses as much as digits as its factorization.

16402426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201215.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 16402426 is about 4049.9908641872. The cubic root of 16402426 is about 254.0793457031.

Adding to 16402426 its reverse (62420461), we get a palindrome (78822887).

It can be divided in two parts, 164024 and 26, that multiplied together give a palindrome (4264624).

The spelling of 16402426 in words is "sixteen million, four hundred two thousand, four hundred twenty-six".