10639900 has 36 divisors (see below), whose sum is σ = 23335312. Its totient is φ = 4210560.

The previous prime is 10639891. The next prime is 10639903. The reversal of 10639900 is 993601.

It is a happy number.

It is a super-2 number, since 2×10639900² = 226414944020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10639903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9784 + ... + 10816.

Almost surely, 2^10639900 is an apocalyptic number.

10639900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10639900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11667656).

10639900 is an abundant number, since it is smaller than the sum of its proper divisors (12695412).

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

10639900 is a wasteful number, since it uses less digits than its factorization.

10639900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 10639900 is about 3261.8859575405. The cubic root of 10639900 is about 219.9442007247.

The spelling of 10639900 in words is "ten million, six hundred thirty-nine thousand, nine hundred".