13402436 has 24 divisors (see below), whose sum is σ = 24300696. Its totient is φ = 6462720.

The previous prime is 13402427. The next prime is 13402453. The reversal of 13402436 is 63420431.

13402436 = 291² + 292² + ... + 401².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7182400 + 6220036 = 2680^2 + 2494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19946 + ... + 20606.

It is an arithmetic number, because the mean of its divisors is an integer number (1012529).

Almost surely, 2^13402436 is an apocalyptic number.

It is an amenable number.

13402436 is a deficient number, since it is larger than the sum of its proper divisors (10898260).

13402436 is a wasteful number, since it uses less digits than its factorization.

13402436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 837 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 13402436 is about 3660.9337606682. The cubic root of 13402436 is about 237.5351659839.

Adding to 13402436 its reverse (63420431), we get a palindrome (76822867).

The spelling of 13402436 in words is "thirteen million, four hundred two thousand, four hundred thirty-six".