10400690 has 8 divisors (see below), whose sum is σ = 18721260. Its totient is φ = 4160272.

The previous prime is 10400681. The next prime is 10400699. The reversal of 10400690 is 9600401.

It is an interprime number because it is at equal distance from previous prime (10400681) and next prime (10400699).

It can be written as a sum of positive squares in 2 ways, for example, as 9803161 + 597529 = 3131^2 + 773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10400690² = 216348704952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10400699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520025 + ... + 520044.

Almost surely, 2^10400690 is an apocalyptic number.

10400690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10400690 is a deficient number, since it is larger than the sum of its proper divisors (8320570).

10400690 is a wasteful number, since it uses less digits than its factorization.

10400690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040076.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 10400690 is about 3225.0100775036. The cubic root of 10400690 is about 218.2834038201.

The spelling of 10400690 in words is "ten million, four hundred thousand, six hundred ninety".