10400438 has 16 divisors (see below), whose sum is σ = 16189440. Its totient is φ = 5005800.

The previous prime is 10400431. The next prime is 10400443. The reversal of 10400438 is 83400401.

It is a super-2 number, since 2×10400438² = 216338221183688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16493 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (1011840).

Almost surely, 2^10400438 is an apocalyptic number.

10400438 is a deficient number, since it is larger than the sum of its proper divisors (5789002).

10400438 is a wasteful number, since it uses less digits than its factorization.

10400438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 10400438 is about 3224.9710076216. The cubic root of 10400438 is about 218.2816408646.

Adding to 10400438 its reverse (83400401), we get a palindrome (93800839).

The spelling of 10400438 in words is "ten million, four hundred thousand, four hundred thirty-eight".